Add LFSA and en PSKOV

5 anos atrás · 296ad257c5
--- a/lfsa/en/index.html
+++ b/lfsa/en/index.html
@@ -0,0 +1,134 @@
 <!DOCTYPE html>
 <html>
    <meta charset="utf-8">
    <head>
        <style>
            #header
            {
                background: #d86323;
                padding: 0.7em;
                text-align: left;
            }
            #header a
            {
                color: white;
                text-decoration: none;
                padding: 0.5em 1em 0.5em 1em;
            }
            #title
            {
                color: #6d2113;
            }
            img
            {
                width: 100%;
            }
            html
            {
                font-family: sans-serif;
            }
            body
            {
                line-height: 1.5em;
            }
            body
            {
                background: #FAFAFA;
            }
            table
            {
                border-collapse: collapse;
                width: 100%;
            }
            
            table, th, td
            {
                border: 1px solid #aaa;
                padding: 0.5em;
                margin-top: 0.5em;
                margin-bottom: 0.5em;
            }
            code, pre
            {
                font-family: monospace, serif;
                font-size: 1em;
                color: #7f0a0c;
                background: #f5f5f5;
                white-space: pre-wrap;
            }
            .contents
            {
                background: #FFFFFF;
                width: 720px;
                padding: 1em;
                margin-top: 2em;
                margin-bottom: 2em;
                border: 1px solid #E0E0E0;
                text-align: left;
                color: #444;
            }
            #footer
            {
                text-align: center;
            }
            #lang
            {
                float: right;
            }
        </style>
        <title>
            Local File System Access (LFSA) for Client Side Web Apps (CSWA)
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">LFSA</strong>
            <div id="lang">
                <a href="../en/index.html">EN</a>
                <a href="../ru/index.html">RU</a>
            </div>
        </div>
        <center><h1>
        </h1></center>
        <center><div class="contents">
 <h2 id="overview">Overview</h2>
 <p>Local File System Access (LFSA) is:</p>
 <ul>
 <li>a tiny web server to allow client side JS access to local file system</li>
 <li>a buildling block for Client Side Web Apps (CSWA)</li>
 <li>a single Python file</li>
 </ul>
 <h2 id="cswa">CSWA</h2>
 <p>Client Side Web Apps run solely on your device, they are not related to cloud solutions in any way: nobody can pull the plug on you.
 CSWAs use LFSA to keep data at your hard drive, so you have complete control of your data.</p>
 <p><a href="http://opengamestudio.org/pskov">PSKOV</a> static site generator is the first CSWA to use LFSA.</p>
 <h2 id="install">Install</h2>
 <p>If you use Linux or macOS released after 2005 (yes, 2005), you only need to <a href="../lfsa-201905.py">download lfsa-201905.py</a>.</p>
 <p>If you use Windows 2000 or newer (excluding Windows ME), you need to:</p>
 <ul>
 <li><a href="https://www.python.org/downloads/windows/">download</a> and install Python 2.3 or newer</li>
 <li><a href="../lfsa-201905.py">download lfsa-201905.py</a></li>
 </ul>
 <h2 id="run">Run</h2>
 <p>If you use Linux or macOS, run LFSA in Terminal this way:</p>
 <pre><code>/path/to/lfsa-201905.py /path/to/dir
 </code></pre>
 <p>Here's how it looks like on macOS Mojave:</p>
 <p><img src="../img/lfsa-on-macos.png" alt="LFSA on macOS Mojave" /></p>
 <p>If you use Windows, run LFSA in <a href="https://en.wikipedia.org/wiki/Cmd.exe">CMD</a> this way:</p>
 <pre><code>C:/path/to/Python/installation/python.exe C:/path/to/lfsa-201905.py C:/path/to/dir
 </code></pre>
 <p>Here's how it looks like on Windows 2000:</p>
 <p><img src="../img/lfsa-on-windows.png" alt="LFSA on Windows 2000" /></p>
 <h2 id="durability">Durability</h2>
 <p>As you noticed, LFSA can run on really old operating systems dating back to 2000. That's intentional: we care about users, so we want to cover as many users as possible.</p>
        </div></center>
        <div id="footer">
            This site has been generated by <a href="http://opengamestudio.org/pskov">PSKOV</a>.
            Source code is <a href="http://github.com/ogstudio/site-lfsa">here</a>.
        </div>
        <script type="text/javascript">
        </script>
    </body>
 </html>

--- a/lfsa/en/index.md
+++ b/lfsa/en/index.md
@@ -0,0 +1,62 @@
 Title: Index
 Date: 2019-05-30 00:00
 Category: Page
 Slug: index
 Lang: en

 ## Overview

 Local File System Access (LFSA) is:

 * a tiny web server to allow client side JS access to local file system
 * a buildling block for Client Side Web Apps (CSWA)
 * a single Python file

 ## CSWA

 Client Side Web Apps run solely on your device, they are not related to cloud solutions in any way: nobody can pull the plug on you.
 CSWAs use LFSA to keep data at your hard drive, so you have complete control of your data.

 [PSKOV][pskov] static site generator is the first CSWA to use LFSA.

 ## Install

 If you use Linux or macOS released after 2005 (yes, 2005), you only need to [download lfsa-201905.py][lfsa-local].

 If you use Windows 2000 or newer (excluding Windows ME), you need to:

 * [download][python] and install Python 2.3 or newer
 * [download lfsa-201905.py][lfsa-local]

 ## Run

 If you use Linux or macOS, run LFSA in Terminal this way:

 ```
 /path/to/lfsa-201905.py /path/to/dir
 ```

 Here's how it looks like on macOS Mojave:

 ![LFSA on macOS Mojave][lfsa-on-macos]

 If you use Windows, run LFSA in [CMD][cmd] this way:

 ```
 C:/path/to/Python/installation/python.exe C:/path/to/lfsa-201905.py C:/path/to/dir
 ```

 Here's how it looks like on Windows 2000:

 ![LFSA on Windows 2000][lfsa-on-windows]

 ## Durability

 As you noticed, LFSA can run on really old operating systems dating back to 2000. That's intentional: we care about users, so we want to cover as many users as possible.

 [pskov]: http://opengamestudio.org/pskov
 [lfsa-local]: ../lfsa-201905.py
 [python]: https://www.python.org/downloads/windows/
 [cmd]: https://en.wikipedia.org/wiki/Cmd.exe
 [lfsa-on-macos]: ../img/lfsa-on-macos.png
 [lfsa-on-windows]: ../img/lfsa-on-windows.png
--- a/lfsa/en/item.template
+++ b/lfsa/en/item.template
@@ -5,11 +5,10 @@
        <style>
            #header
            {
                background: #856d51;
                background: #d86323;
                padding: 0.7em;
                text-align: left;
            }
            
            #header a
            {
                color: white;
@@ -18,12 +17,11 @@
            }
            #title
            {
                color: #433729;
                color: #6d2113;
            }
            iframe
            img
            {
                width: 720px;
                height: 720px;
                width: 100%;
            }
            html
            {
@@ -69,26 +67,36 @@
                text-align: left;
                color: #444;
            }
            #footer
            {
                text-align: center;
            }
            #lang
            {
                float: right;
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            Local File System Access (LFSA) for Client Side Web Apps (CSWA)
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="education.html">Education</a>
            <strong id="title">LFSA</strong>
            <div id="lang">
                <a href="../en/PSKOV_ITEM_URL">EN</a>
                <a href="../ru/PSKOV_ITEM_URL">RU</a>
            </div>
        </div>
        <center><h1>
 Tool
        </h1></center>
        <center><div class="contents">
 <p><strong>PSKOV</strong> is a static site generator that runs in your web browser. What you see now has also been generated with <strong>PSKOV</strong>. If you're new to <strong>PSKOV</strong>, visit <a href="education.html">education page</a>.</p>
 <iframe id="pskov" src="pskov-201905.html">
    <p>ERROR Your browser does not support iframes</p>
 </iframe>
 PSKOV_ITEM_CONTENTS
        </div></center>
        <div id="footer">
            This site has been generated by <a href="http://opengamestudio.org/pskov">PSKOV</a>.
            Source code is <a href="http://github.com/ogstudio/site-lfsa">here</a>.
        </div>
        <script type="text/javascript">
        </script>
    </body>
--- a/lfsa/img/lfsa-on-macos.png
+++ b/lfsa/img/lfsa-on-macos.png
--- a/lfsa/img/lfsa-on-windows.png
+++ b/lfsa/img/lfsa-on-windows.png
--- a/lfsa/index.html
+++ b/lfsa/index.html
@@ -0,0 +1,4 @@
 <!DOCTYPE html>
 <html>
    <meta http-equiv="refresh" content="0; URL='en/index.html'"/>
 </html>
--- a/lfsa/ru/index.html
+++ b/lfsa/ru/index.html
@@ -0,0 +1,134 @@
 <!DOCTYPE html>
 <html>
    <meta charset="utf-8">
    <head>
        <style>
            #header
            {
                background: #d86323;
                padding: 0.7em;
                text-align: left;
            }
            #header a
            {
                color: white;
                text-decoration: none;
                padding: 0.5em 1em 0.5em 1em;
            }
            #title
            {
                color: #6d2113;
            }
            img
            {
                width: 100%;
            }
            html
            {
                font-family: sans-serif;
            }
            body
            {
                line-height: 1.5em;
            }
            body
            {
                background: #FAFAFA;
            }
            table
            {
                border-collapse: collapse;
                width: 100%;
            }
            
            table, th, td
            {
                border: 1px solid #aaa;
                padding: 0.5em;
                margin-top: 0.5em;
                margin-bottom: 0.5em;
            }
            code, pre
            {
                font-family: monospace, serif;
                font-size: 1em;
                color: #7f0a0c;
                background: #f5f5f5;
                white-space: pre-wrap;
            }
            .contents
            {
                background: #FFFFFF;
                width: 720px;
                padding: 1em;
                margin-top: 2em;
                margin-bottom: 2em;
                border: 1px solid #E0E0E0;
                text-align: left;
                color: #444;
            }
            #footer
            {
                text-align: center;
            }
            #lang
            {
                float: right;
            }
        </style>
        <title>
            К Локальной Файловой Системе Доступн (ЛФСД, LFSA) для Сетевых Приложений на Стороне Клиента (СПСК, CSWA)
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">LFSA</strong>
            <div id="lang">
                <a href="../en/index.html">EN</a>
                <a href="../ru/index.html">RU</a>
            </div>
        </div>
        <center><h1>
        </h1></center>
        <center><div class="contents">
 <h2 id="">Обзор</h2>
 <p>К Локальной Файловой Системе Доступ (ЛФСД, LFSA) является:</p>
 <ul>
 <li>крошечным веб-сервером для доступа клиентских приложений JS к локальной файловой системе</li>
 <li>кирпичиком фундамента Сетевых Приложений на Стороне Клиента (СПСК, CSWA)</li>
 <li>файлом Python</li>
 </ul>
 <h2 id="-1">СПСК</h2>
 <p>Сетевые Приложения на Стороне Клиента выполняются исключительно на вашем устройстве, они никак не связаны с облачными решениями: никто не сможет их отключить.
 СПСК используют ЛФСД для хранения данных на вашем жёстком диске, поэтому вы полностью владеете своими данными.</p>
 <p><a href="http://opengamestudio.org/pskov">ПСКОВ</a> (генератор статических сайтов) является первым СПСК, использующим ЛФСД.</p>
 <h2 id="-2">Установка</h2>
 <p>Если вы используете Linux или macOS, выпущенные после 2005-го (да, 2005-го), вам необходимо просто <a href="../lfsa-201905.py">загрузить lfsa-201905.py</a>.</p>
 <p>Если вы используете Windows 2000 или новее (за исключением Windows ME), вам необходимо:</p>
 <ul>
 <li><a href="https://www.python.org/downloads/windows/">загрузить</a> и установить Python 2.3 либо новее</li>
 <li><a href="../lfsa-201905.py">загрузить lfsa-201905.py</a></li>
 </ul>
 <h2 id="-3">Запуск</h2>
 <p>Если вы используете Linux или macOS, запускайте ЛФСД в Терминале следующим образом:</p>
 <pre><code>/путь/до/lfsa-201905.py /путь/до/директории
 </code></pre>
 <p>Вот как это выглядит на macOS Mojave:</p>
 <p><img src="../img/lfsa-on-macos.png" alt="ЛФСД на macOS Mojave" /></p>
 <p>Если вы используете Windows, запускайте ЛФСД в <a href="https://ru.wikipedia.org/wiki/Cmd.exe">CMD</a> следующим образом:</p>
 <pre><code>C:/путь/до/установки/Python/python.exe C:/путь/до/lfsa-201905.py C:/путь/до/директории
 </code></pre>
 <p>Вот как это выглядит на Windows 2000:</p>
 <p><img src="../img/lfsa-on-windows.png" alt="ЛФСД на Windows 2000" /></p>
 <h2 id="-4">Долговечность</h2>
 <p>Как вы заметили, ЛФСД может работать на действительно старых операционных системах, родом из 2000-х. Это осознанный выбор: мы заботимся о пользователях, поэтому хотим предоставить наш инструмент как можно большему числу пользователей.</p>
        </div></center>
        <div id="footer">
            Этот сайт сгенерирован <a href="http://opengamestudio.org/pskov">ПСКОВОМ</a>.
            Исходный код <a href="http://github.com/ogstudio/site-lfsa">здесь</a>.
        </div>
        <script type="text/javascript">
        </script>
    </body>
 </html>

--- a/lfsa/ru/index.md
+++ b/lfsa/ru/index.md
@@ -0,0 +1,63 @@
 Title: Начальная
 Date: 2019-05-30 00:00
 Category: Page
 Slug: index
 Lang: ru

 ## Обзор

 К Локальной Файловой Системе Доступ (ЛФСД, LFSA) является:

 * крошечным веб-сервером для доступа клиентских приложений JS к локальной файловой системе
 * кирпичиком фундамента Сетевых Приложений на Стороне Клиента (СПСК, CSWA)
 * файлом Python

 ## СПСК 

 Сетевые Приложения на Стороне Клиента выполняются исключительно на вашем устройстве, они никак не связаны с облачными решениями: никто не сможет их отключить.
 СПСК используют ЛФСД для хранения данных на вашем жёстком диске, поэтому вы полностью владеете своими данными.

 [ПСКОВ][pskov] (генератор статических сайтов) является первым СПСК, использующим ЛФСД.

 ## Установка

 Если вы используете Linux или macOS, выпущенные после 2005-го (да, 2005-го), вам необходимо просто [загрузить lfsa-201905.py][lfsa-local].

 Если вы используете Windows 2000 или новее (за исключением Windows ME), вам необходимо:

 * [загрузить][python] и установить Python 2.3 либо новее
 * [загрузить lfsa-201905.py][lfsa-local]

 ## Запуск


 Если вы используете Linux или macOS, запускайте ЛФСД в Терминале следующим образом:

 ```
 /путь/до/lfsa-201905.py /путь/до/директории
 ```

 Вот как это выглядит на macOS Mojave:

 ![ЛФСД на macOS Mojave][lfsa-on-macos]

 Если вы используете Windows, запускайте ЛФСД в [CMD][cmd] следующим образом:

 ```
 C:/путь/до/установки/Python/python.exe C:/путь/до/lfsa-201905.py C:/путь/до/директории
 ```

 Вот как это выглядит на Windows 2000:

 ![ЛФСД на Windows 2000][lfsa-on-windows]

 ## Долговечность

 Как вы заметили, ЛФСД может работать на действительно старых операционных системах, родом из 2000-х. Это осознанный выбор: мы заботимся о пользователях, поэтому хотим предоставить наш инструмент как можно большему числу пользователей.

 [pskov]: http://opengamestudio.org/pskov
 [lfsa-local]: ../lfsa-201905.py
 [python]: https://www.python.org/downloads/windows/
 [cmd]: https://ru.wikipedia.org/wiki/Cmd.exe
 [lfsa-on-macos]: ../img/lfsa-on-macos.png
 [lfsa-on-windows]: ../img/lfsa-on-windows.png
--- a/lfsa/ru/item.template
+++ b/lfsa/ru/item.template
@@ -0,0 +1,104 @@
 <!DOCTYPE html>
 <html>
    <meta charset="utf-8">
    <head>
        <style>
            #header
            {
                background: #d86323;
                padding: 0.7em;
                text-align: left;
            }
            #header a
            {
                color: white;
                text-decoration: none;
                padding: 0.5em 1em 0.5em 1em;
            }
            #title
            {
                color: #6d2113;
            }
            img
            {
                width: 100%;
            }
            html
            {
                font-family: sans-serif;
            }
            body
            {
                line-height: 1.5em;
            }
            body
            {
                background: #FAFAFA;
            }
            table
            {
                border-collapse: collapse;
                width: 100%;
            }
            
            table, th, td
            {
                border: 1px solid #aaa;
                padding: 0.5em;
                margin-top: 0.5em;
                margin-bottom: 0.5em;
            }
            code, pre
            {
                font-family: monospace, serif;
                font-size: 1em;
                color: #7f0a0c;
                background: #f5f5f5;
                white-space: pre-wrap;
            }
            .contents
            {
                background: #FFFFFF;
                width: 720px;
                padding: 1em;
                margin-top: 2em;
                margin-bottom: 2em;
                border: 1px solid #E0E0E0;
                text-align: left;
                color: #444;
            }
            #footer
            {
                text-align: center;
            }
            #lang
            {
                float: right;
            }
        </style>
        <title>
            К Локальной Файловой Системе Доступн (ЛФСД, LFSA) для Сетевых Приложений на Стороне Клиента (СПСК, CSWA)
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">LFSA</strong>
            <div id="lang">
                <a href="../en/PSKOV_ITEM_URL">EN</a>
                <a href="../ru/PSKOV_ITEM_URL">RU</a>
            </div>
        </div>
        <center><h1>
        </h1></center>
        <center><div class="contents">
 PSKOV_ITEM_CONTENTS
        </div></center>
        <div id="footer">
            Этот сайт сгенерирован <a href="http://opengamestudio.org/pskov">ПСКОВОМ</a>.
            Исходный код <a href="http://github.com/ogstudio/site-lfsa">здесь</a>.
        </div>
        <script type="text/javascript">
        </script>
    </body>
 </html>

--- a/pskov/en/education.01.why.html
+++ b/pskov/en/education.01.why.html
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,13 +66,13 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
--- a/pskov/en/education.01.why.md
+++ b/pskov/en/education.01.why.md
@@ -0,0 +1,65 @@
 Title: Education: 01. Why
 Date: 2019-05-14 00:00
 Category: Page
 Slug: education.01.why 
 Lang: en

 | < Back | Index | Next > |
 |---|---|---|
 | Not available | [Education][index] | [02. Dependencies][next] |

 </div><div class="contents">

 In this document we briefly explain why **PSKOV** was created.

 Estimated completion time: 5 minutes.

 **Table of contents**

 * [01. Why](#why)
 * [02. Features](#features)

 <a name="why"/>

 ## 01. Why

 You might know there already exist quite a lot of [static site generators][other-generators], why create another one? Because **they are not good enough** for [Opensource Game Studio][ogs] needs.

 Here's a list of **features we don't need**:

 | № | Unwelcome feature | Note |
 |---|---|---|
 | 1 | Learning anything beyond HTML, CSS, JavaScript, and Markdown | These technologies are enough to deliver information to users |
 | 2 | Server side | Nobody should be able to pull the plug on you except yourself |
 | 3 | Installation | We had enough updates that were never requested |
 | 4 | Comprehensible source code | Single file with just enough number of lines |

 <a name="features"/>

 ## 02. Features

 Consequently, here is a list of **PSKOV features**:

 | № | PSKOV feature | Note |
 |---|---|---|
 | 1 | Bare HTML, CSS, JavaScript, and Markdown | No need for template language, web framework or anything else |
 | 2 | Client side | **PSKOV** is a client side JavaScript application, it runs solely on your device |
 | 3 | Optional installation | **PSKOV** is available at [http://opengamestudio.org/pskov][pskov]. However, if you want to keep **PSKOV** locally, you can get **PSKOV** single HTML file [here][pskov-src] and open it locally |
 | 4 | Comprehensible source code | **PSKOV** is a [single HTML file][pskov-src] with less than 10000 lines of code |
 | 5 | Decades long support (DLS) | You can use **PSKOV** on both Windows 2000 and Windows 2030\* |

 \* Windows 2030 does not (yet) exist, we simply refer to the fact that **PSKOV** is designed to work for operating systems released in the range of years 2000-2030

 </div><div class="contents">

 | < Back | Index | Next > |
 |---|---|---|
 | Not available | [Education][index] | [02. Dependencies][next] |

 [index]: education.html
 [next]: education.02.deps.html

 [other-generators]: https://medium.com/codingthesmartway-com-blog/top-static-site-generators-for-2019-26a4c8afcc05
 [ogs]: http://opengamestudio.org
 [pskov]: http://opengamestudio.org/pskov
 [pskov-src]: http://opengamestudio.org/pskov-201905.html
--- a/pskov/en/education.02.deps.html
+++ b/pskov/en/education.02.deps.html
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,13 +66,13 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
@@ -101,23 +96,22 @@ Education: 02. Dependencies
 </tbody>
 </table>
 <p></div><div class="contents"></p>
 <p>In this document we teach how to install <strong>PSKOV</strong> dependencies.</p>
 <p>Estimated completion time: ?? minutes.</p>
 <p>In this document we describe <strong>PSKOV</strong> dependencies and how to get them.</p>
 <p>Estimated completion time: 5 minutes.</p>
 <p><strong>Table of contents</strong></p>
 <ul>
 <li><a href="#deps">01. Dependencies</a></li>
 <li><a href="#lfsa">02. Install LFSA</a></li>
 <li><a href="#showdown">03. Showdown</a></li>
 <li><a href="#details">02. Details</a></li>
 </ul>
 <p><a name="deps"/></p>
 <h2 id="01dependencies">01. Dependencies</h2>
 <p>We designed <strong>PSKOV</strong> to run inside web browsers. Hence, here is a list of <strong>PSKOV dependencies</strong>:</p>
 <p>We designed <strong>PSKOV</strong> to run inside web browsers. Here is what you need to run <strong>PSKOV</strong>:</p>
 <table>
 <thead>
 <tr>
 <th>№</th>
 <th>Dependency</th>
 <th>Note</th>
 <th>PSKOV dependency</th>
 <th>Notes</th>
 </tr>
 </thead>
 <tbody>
@@ -128,18 +122,27 @@ Education: 02. Dependencies
 </tr>
 <tr>
 <td>2</td>
 <td>Local file system access (LFSA)</td>
 <td><a href="http://opengamestudio.org/lfsa">LFSA</a> gives <strong>PSKOV</strong> access to your local file system</td>
 <td>Local file system access</td>
 <td><a href="http://opengamestudio.org/lfsa">LFSA</a> gives <strong>PSKOV</strong> access to your local file system. Install LFSA to be able to use <strong>PSKOV</strong>.</td>
 </tr>
 </tbody>
 </table>
 <p>Since <strong>PSKOV</strong> is a client side JavaScript application, it has no direct access to your local file system to generate files. That's why we have also created <a href="http://opengamestudio.org/lfsa">LFSA</a>, a tiny Python server to provide read/write access to your local file system at 8000 port. LFSA is under 200 lines of code, feel free to <a href="TODO-LFSA-SRC">inspect it</a> to make sure we don't steal your data.</p>
 <p><a name="lfsa"/></p>
 <h2 id="02installlfsa">02. Install LFSA</h2>
 <p>TODO </p>
 <p><a name="showdown"/></p>
 <h2 id="03showdown">03. Showdown</h2>
 <p>Tell Showdown.JS is used to convert Markdown to HTML, so users should refer to Showdown.JS for rules.</p>
 <p><strong>Note</strong>: <a href="http://opengamestudio.org/lfsa">install LFSA</a> to be able to use <strong>PSKOV</strong>.</p>
 <p><a name="details"/></p>
 <h2 id="02details">02. Details</h2>
 <p><strong>PSKOV</strong>:</p>
 <ul>
 <li>is a client side JavaScript application</li>
 <li>has no direct access to local file system</li>
 <li>uses <a href="http://opengamestudio.org/lfsa">LFSA</a> to access local file system</li>
 <li>uses <a href="https://github.com/showdownjs/showdown">Showdown</a> to convert Markdown to HTML</li>
 </ul>
 <p><strong>LFSA</strong>:</p>
 <ul>
 <li>is a tiny Python server to provide read/write access to local file system</li>
 <li>runs at 8000 port</li>
 <li>is under 200 lines of code, feel free to <a href="https://bitbucket.org/ogstudio/lfsa/src/default/lfsa-201905.py">inspect it</a></li>
 </ul>
 <p></div><div class="contents"></p>
 <table>
 <thead>
--- a/pskov/en/education.02.deps.md
+++ b/pskov/en/education.02.deps.md
@@ -0,0 +1,64 @@
 Title: Education: 02. Dependencies
 Date: 2019-05-14 00:00
 Category: Page
 Slug: education.02.deps
 Lang: en

 | < Back | Index | Next > |
 |---|---|---|
 | [01. Why][prev] | [Education][index] | [03. Site][next] |

 </div><div class="contents">

 In this document we describe **PSKOV** dependencies and how to get them.

 Estimated completion time: 5 minutes.

 **Table of contents**

 * [01. Dependencies](#deps)
 * [02. Details](#details)

 <a name="deps"/>

 ## 01. Dependencies

 We designed **PSKOV** to run inside web browsers. Here is what you need to run **PSKOV**:

 | № | PSKOV dependency | Notes |
 |---|---|---|
 | 1 | Web browser of 2010 or newer | **PSKOV** needs ECMAScript 5 (2009), any modern web browser should work |
 | 2 | Local file system access | [LFSA][lfsa] gives **PSKOV** access to your local file system. Install LFSA to be able to use **PSKOV**. |

 **Note**: [install LFSA][lfsa] to be able to use **PSKOV**.

 <a name="details"/>

 ## 02. Details

 **PSKOV**:

 * is a client side JavaScript application
 * has no direct access to local file system
 * uses [LFSA][lfsa] to access local file system
 * uses [Showdown][showdown] to convert Markdown to HTML

 **LFSA**:

 * is a tiny Python server to provide read/write access to local file system
 * runs at 8000 port
 * is under 200 lines of code, feel free to [inspect it][lfsa-src]

 </div><div class="contents">

 | < Back | Index | Next > |
 |---|---|---|
 | [01. Why][prev] | [Education][index] | [03. Site][next] |

 [index]: education.html
 [prev]: education.01.why.html
 [next]: education.03.site.html

 [lfsa]: http://opengamestudio.org/lfsa
 [lfsa-src]: https://bitbucket.org/ogstudio/lfsa/src/default/lfsa-201905.py
 [showdown]: https://github.com/showdownjs/showdown
--- a/pskov/en/education.03.site.html
+++ b/pskov/en/education.03.site.html
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,13 +66,13 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
@@ -102,15 +97,16 @@ Education: 03. Site
 </table>
 <p></div><div class="contents"></p>
 <p>In this document we create a simple static web site with two pages.</p>
 <p>Estimated completion time: ? minutes.</p>
 <p>Estimated completion time: 10 minutes.</p>
 <p><strong>Table of contents</strong></p>
 <ul>
 <li><a href="#inspiration">01. Inspiration</a></li>
 <li><a href="#cfg">02. Investigate <code>cfg</code> file</a></li>
 <li><a href="#item">03. Investigate <code>item.template</code> file</a></li>
 <li><a href="#md">04. Investigate <code>index.md</code> and <code>cv.md</code> files</a></li>
 <li><a href="#md">04. Investigate <code>about.md</code> and <code>cv.md</code> files</a></li>
 <li><a href="#lfsa">05. Launch LFSA</a></li>
 <li><a href="#gen">06. Generate the site</a></li>
 <li><a href="#summary">07. Summary</a></li>
 </ul>
 <p><a name="inspiration"/></p>
 <h2 id="01inspiration">01. Inspiration</h2>
@@ -124,7 +120,7 @@ Education: 03. Site
 <ul>
 <li>cfg</li>
 <li>item.template</li>
 <li>index.md</li>
 <li>about.md</li>
 <li>cv.md</li>
 </ul>
 <p>Let's look at their contents closer.</p>
@@ -149,7 +145,7 @@ item = item.template
 </tr>
 <tr>
 <td><code>item</code></td>
 <td>Points to an HTML template file that will be used to generate HTML files out of Markdown ones</td>
 <td>Points to an HTML template file that is used to generate HTML files out of Markdown ones</td>
 </tr>
 </tbody>
 </table>
@@ -162,14 +158,14 @@ item = item.template
    &lt;meta charset="utf-8"&gt;
    &lt;head&gt;
        &lt;style&gt;
            - - - - Style was collapsed for brevity - - - -
            - - - - Collapsed for brevity - - - -
        &lt;/style&gt;
        &lt;title&gt;Serov&lt;/title&gt;
    &lt;/head&gt;
    &lt;body&gt;
        &lt;div id="header"&gt;
            &lt;strong&gt;Serov&lt;/strong&gt;
            &lt;a href="index.html"&gt;About me&lt;/a&gt;
            &lt;a href="about.html"&gt;About me&lt;/a&gt;
            &lt;a href="cv.html"&gt;CV&lt;/a&gt;
        &lt;/div&gt;
        &lt;center&gt;
@@ -177,12 +173,15 @@ item = item.template
            &lt;div class="contents"&gt;
 PSKOV_ITEM_CONTENTS
            &lt;/div&gt;
            &lt;div id="footer"&gt;
                This sample web site has been generated by &lt;a href="http://opengamestudio.org/pskov"&gt;PSKOV&lt;/a&gt;.
            &lt;/div&gt;
        &lt;/center&gt;
    &lt;/body&gt;
 &lt;/html&gt;
 </code></pre>
 <p><strong>Note</strong>: style was collapsed for brevity.</p>
 <p>As you can see, <code>item.template</code> is an average HTML file with two constants specified:</p>
 <p>As you can see, <code>item.template</code> is an average HTML file with two <strong>PSKOV</strong> constants specified:</p>
 <table>
 <thead>
 <tr>
@@ -207,16 +206,16 @@ PSKOV_ITEM_CONTENTS
 <li>page's header section is described below</li>
 </ul>
 <p><a name="md"/></p>
 <h2 id="04investigateindexmdandcvmdfiles">04. Investigate <code>index.md</code> and <code>cv.md</code> files</h2>
 <p><code>index.md</code> file has the following contents:</p>
 <h2 id="04investigateaboutmdandcvmdfiles">04. Investigate <code>about.md</code> and <code>cv.md</code> files</h2>
 <p><code>about.md</code> file has the following contents:</p>
 <pre><code> Title: About me
 Slug: index
 Slug: about

 Hi, my name is Valentin Serov. Here's my self-portrait:

 ![Valentin Serov self-portrait][serov-portrait]

 - - - - Contents were collapsed for brevity - - - -
 - - - - Collapsed for brevity - - - -

 Have a look at my [CV][cv] now.

@@ -228,7 +227,7 @@ PSKOV_ITEM_CONTENTS
 [pskov]: http://opengamestudio.org/pskov
 [cv]: cv.html
 </code></pre>
 <p><code>index.md</code> starts with a so-called header section:</p>
 <p><code>about.md</code> starts with a so-called header section:</p>
 <table>
 <thead>
 <tr>
@@ -243,11 +242,11 @@ PSKOV_ITEM_CONTENTS
 </tr>
 <tr>
 <td><code>Slug:</code></td>
 <td>Tells <strong>PSKOV</strong> that this particular Markdown file should be saved under <code>&lt;slug&gt;.html</code> filename</td>
 <td>Tells <strong>PSKOV</strong> that particular Markdown file should be saved under <code>&lt;slug&gt;.html</code> filename</td>
 </tr>
 </tbody>
 </table>
 <p>The rest of <code>index.md</code> contents is what any Markdown file looks like.</p>
 <p>The rest of <code>about.md</code> contents is what any Markdown file looks like.</p>
 <p><strong>Note</strong>: <code>cv</code> page is referenced as <code>cv.html</code>, not <code>cv.md</code></p>
 <p><code>cv.md</code> file has the following contents:</p>
 <pre><code> Title: Curriculum vitae
@@ -267,8 +266,8 @@ PSKOV_ITEM_CONTENTS
 <p>As you can see, there's nothing new in <code>cv.md</code> except for a Markdown table.</p>
 <p><a name="lfsa"/></p>
 <h2 id="05launchlfsa">05. Launch LFSA</h2>
 <p>Launch LFSA so that it points to directory with the files we just observed:</p>
 <pre><code>$ /path/to/local-file-system-access.py /path/to/dir/01.TwoPages
 <p>Launch <a href="http://opengamestudio.org/lfsa">LFSA</a> so that it points to directory with the files we just observed:</p>
 <pre><code>$ /path/to/lfsa-201905.py /path/to/dir/01.TwoPages
 </code></pre>
 <p>You should see output similar to this:</p>
 <pre><code>DIR: '/Users/kornerr/p/site-pskov-sample/01.TwoPages'
@@ -283,10 +282,69 @@ PORT: '8000'
 <li><code>Path:</code> points to the same directory you specified before</li>
 <li><code>Input directory:</code> and <code>Item template:</code> have values from <code>cfg</code></li></ul></li>
 <li>Press <code>Generate</code> button to generate HTML files right where Markdown ones reside</li>
 <li>Open generated <code>index.html</code> from the site's directory</li>
 <li>Open generated <code>about.html</code> from the site's directory</li>
 <li>You should see your web site running locally</li>
 </ul>
 <p>Take time to observe your new shiny personal web site consisting of two pages.</p>
 <p><a name="summary"/></p>
 <h2 id="07summary">07. Summary</h2>
 <p>You have successfully generated a web site with two pages. <a href="http://opengamestudio.org/pskov/sample/01.TwoPages/about.html">Check out the result</a>.</p>
 <p>Introduced PSKOV constants include:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_ITEM_TITLE</code></td>
 <td>Provides title from <code>Title:</code> part of page's header section</td>
 </tr>
 <tr>
 <td><code>PSKOV_ITEM_CONTENTS</code></td>
 <td>Provides HTML contents generated out of Markdown contents</td>
 </tr>
 </tbody>
 </table>
 <p>Introduced configuration keys include:</p>
 <table>
 <thead>
 <tr>
 <th>Key</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>input</code></td>
 <td>Points to a directory where <code>item</code>'s file is located</td>
 </tr>
 <tr>
 <td><code>item</code></td>
 <td>Points to an HTML template file that is used to generate HTML files out of Markdown ones</td>
 </tr>
 </tbody>
 </table>
 <p>Introduced header constants include:</p>
 <table>
 <thead>
 <tr>
 <th>Header constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>Title:</code></td>
 <td>Provides value for <code>PSKOV_ITEM_TITLE</code> constant when generating HTML out of Markdown</td>
 </tr>
 <tr>
 <td><code>Slug:</code></td>
 <td>Tells <strong>PSKOV</strong> that particular Markdown file should be saved under <code>&lt;slug&gt;.html</code> filename</td>
 </tr>
 </tbody>
 </table>
 <p></div><div class="contents"></p>
 <table>
 <thead>
--- a/pskov/en/education.03.site.md
+++ b/pskov/en/education.03.site.md
@@ -0,0 +1,247 @@
 Title: Education: 03. Site
 Date: 2019-05-14 00:00
 Category: Page
 Slug: education.03.site
 Lang: en

 | < Back | Index | Next > |
 |---|---|---|
 | [02. Dependencies][prev] | [Education][index] | [04. Language][next] |

 </div><div class="contents">

 In this document we create a simple static web site with two pages.

 Estimated completion time: 10 minutes.

 **Table of contents**

 * [01. Inspiration](#inspiration)
 * [02. Investigate `cfg` file](#cfg)
 * [03. Investigate `item.template` file](#item)
 * [04. Investigate `about.md` and `cv.md` files](#md)
 * [05. Launch LFSA](#lfsa)
 * [06. Generate the site](#gen)
 * [07. Summary](#summary)

 <a name="inspiration"/>

 ## 01. Inspiration

 Suppose you are a great Russian painter named Valentin Serov. Everytime anyone wants to know about you they refer to [Wikipedia][serov]. You wake up earlier today with a distinct desire to have your very own personal web site.

 You set on to create the following pages:

 * About me
 * Curriculum vitae (CV)

 Some time later you have the following files in your [site directory][01-files]:

 * cfg
 * item.template
 * about.md
 * cv.md

 Let's look at their contents closer.

 <a name="cfg"/>

 ## 02. Investigate `cfg` file

 `cfg` file has the following contents:

 ```
 input = .
 item = item.template
 ```

 `cfg` is an [INI file][ini-file] with the following keys specified:

 | Key | Description |
 |---|---|
 | `input` | Points to a directory where `item`'s file is located |
 | `item` | Points to an HTML template file that is used to generate HTML files out of Markdown ones |

 In our case, `item.template` file is located alongside `cfg`, so we use `.` to denote current directory.

 <a name="item"/>

 ## 03. Investigate `item.template` file

 `item.template` file has the following contents:

 ```
 <!DOCTYPE html>
 <html>
    <meta charset="utf-8">
    <head>
        <style>
            - - - - Collapsed for brevity - - - -
        </style>
        <title>Serov</title>
    </head>
    <body>
        <div id="header">
            <strong>Serov</strong>
            <a href="about.html">About me</a>
            <a href="cv.html">CV</a>
        </div>
        <center>
            <h1>PSKOV_ITEM_TITLE</h1>
            <div class="contents">
 PSKOV_ITEM_CONTENTS
            </div>
            <div id="footer">
                This sample web site has been generated by <a href="http://opengamestudio.org/pskov">PSKOV</a>.
            </div>
        </center>
    </body>
 </html>
 ```

 **Note**: style was collapsed for brevity.

 As you can see, `item.template` is an average HTML file with two **PSKOV** constants specified:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_TITLE` | Provides title from `Title:` part of page's header section |
 | `PSKOV_ITEM_CONTENTS` | Provides HTML contents generated out of Markdown contents |

 **Notes**:

 * other **PSKOV** constants are described later
 * page's header section is described below

 <a name="md"/>

 ## 04. Investigate `about.md` and `cv.md` files

 `about.md` file has the following contents:

 ```
 Title: About me
 Slug: about

 Hi, my name is Valentin Serov. Here's my self-portrait:
 
 ![Valentin Serov self-portrait][serov-portrait]

 - - - - Collapsed for brevity - - - -
 
 Have a look at my [CV][cv] now.

 [serov]: https://en.wikipedia.org/wiki/Valentin_Serov
 [revolution]: https://en.wikipedia.org/wiki/Russian_Revolution
 [serov-portrait]: myself.jpg
 [serov-work]: mywork.jpg
 [girl-with-peaches]: https://en.wikipedia.org/wiki/Girl_with_Peaches
 [pskov]: http://opengamestudio.org/pskov
 [cv]: cv.html
 ```

 `about.md` starts with a so-called header section:

 | Header constant | Description |
 |---|---|
 | `Title:` | Provides value for `PSKOV_ITEM_TITLE` constant when generating HTML out of Markdown |
 | `Slug:` | Tells **PSKOV** that particular Markdown file should be saved under `<slug>.html` filename |

 The rest of `about.md` contents is what any Markdown file looks like.

 **Note**: `cv` page is referenced as `cv.html`, not `cv.md`

 `cv.md` file has the following contents:

 ```
 Title: Curriculum vitae
 Slug: cv
 
 Here's my CV in case my paintings still interest you. I took a bit of a modern IT approach to structure my CV as key-value pairs of a dictionary (map), enjoy!
 
 | Key | Value |
 |---|---|
 | Name | Valentin Serov |
 | Age | 46 |
 | Marital status | Married |
 | Country | Russian Empire |
 | Alma mater | Imperial Academy of Arts |
 | Education | * Member Academy of Arts (1898) <br> * Full Member Academy of Arts (1903) |
 ```

 As you can see, there's nothing new in `cv.md` except for a Markdown table.

 <a name="lfsa"/>

 ## 05. Launch LFSA

 Launch [LFSA][lfsa] so that it points to directory with the files we just observed:

 ```
 $ /path/to/lfsa-201905.py /path/to/dir/01.TwoPages
 ```

 You should see output similar to this:

 ```
 DIR: '/Users/kornerr/p/site-pskov-sample/01.TwoPages'
 PORT: '8000'
 ```

 <a name="gen"/>

 ## 06. Generate the site

 Now it's finally time to generate your personal web site:

 * Go to [Tool][tool] page
 * Make sure
    * `Path:` points to the same directory you specified before
    * `Input directory:` and `Item template:` have values from `cfg`
 * Press `Generate` button to generate HTML files right where Markdown ones reside
 * Open generated `about.html` from the site's directory
 * You should see your web site running locally

 <a name="summary"/>

 ## 07. Summary

 You have successfully generated a web site with two pages. [Check out the result][01-sample].

 Introduced PSKOV constants include:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_TITLE` | Provides title from `Title:` part of page's header section |
 | `PSKOV_ITEM_CONTENTS` | Provides HTML contents generated out of Markdown contents |

 Introduced configuration keys include:

 | Key | Description |
 |---|---|
 | `input` | Points to a directory where `item`'s file is located |
 | `item` | Points to an HTML template file that is used to generate HTML files out of Markdown ones |

 Introduced header constants include:

 | Header constant | Description |
 |---|---|
 | `Title:` | Provides value for `PSKOV_ITEM_TITLE` constant when generating HTML out of Markdown |
 | `Slug:` | Tells **PSKOV** that particular Markdown file should be saved under `<slug>.html` filename |

 </div><div class="contents">

 | < Back | Index | Next > |
 |---|---|---|
 | [02. Dependencies][prev] | [Education][index] | [04. Language][next] |

 [index]: education.html
 [prev]: education.02.deps.html
 [next]: education.04.lang.html

 [01-files]: https://github.com/OGStudio/site-pskov-sample/tree/master/01.TwoPages
 [01-sample]: http://opengamestudio.org/pskov/sample/01.TwoPages/about.html
 [ini-file]: https://en.wikipedia.org/wiki/INI_file
 [serov]: https://en.wikipedia.org/wiki/Valentin_Serov
 [lfsa]: http://opengamestudio.org/lfsa
 [tool]: http://opengamestudio.org/pskov
--- a/pskov/en/education.04.lang.html
+++ b/pskov/en/education.04.lang.html
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,13 +66,13 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
@@ -102,7 +97,7 @@ Education: 04. Language
 </table>
 <p></div><div class="contents"></p>
 <p>In this document we add language selection.</p>
 <p>Estimated completion time: ? minutes.</p>
 <p>Estimated completion time: 10 minutes.</p>
 <p><strong>Table of contents</strong></p>
 <ul>
 <li><a href="#localization">01. Localization</a></li>
@@ -110,6 +105,7 @@ Education: 04. Language
 <li><a href="#item">03. Investigate template files</a></li>
 <li><a href="#md">04. Investigate Markdown files</a></li>
 <li><a href="#gen">05. Launch LFSA and generate the site</a></li>
 <li><a href="#summary">06. Summary</a></li>
 </ul>
 <p><a name="localization"/></p>
 <h2 id="01localization">01. Localization</h2>
@@ -118,10 +114,10 @@ Education: 04. Language
 <ul>
 <li><code>cfg</code></li>
 <li><code>en/item.template</code></li>
 <li><code>en/index.md</code></li>
 <li><code>en/about.md</code></li>
 <li><code>en/cv.md</code></li>
 <li><code>ru/item.template</code></li>
 <li><code>ru/index.md</code></li>
 <li><code>ru/about.md</code></li>
 <li><code>ru/cv.md</code></li>
 </ul>
 <p>Let's look at the contents of these files closer.</p>
@@ -143,7 +139,7 @@ item = item.template
    &lt;body&gt;
        &lt;div id="header"&gt;
            &lt;strong&gt;Serov&lt;/strong&gt;
            &lt;a href="index.html"&gt;About me&lt;/a&gt;
            &lt;a href="about.html"&gt;About me&lt;/a&gt;
            &lt;a href="cv.html"&gt;CV&lt;/a&gt;
            &lt;div id="lang"&gt;
                &lt;a href="../en/PSKOV_ITEM_URL"&gt;EN&lt;/a&gt;
@@ -160,7 +156,7 @@ item = item.template
    &lt;body&gt;
        &lt;div id="header"&gt;
            &lt;strong&gt;Серов&lt;/strong&gt;
            &lt;a href="index.html"&gt;Обо мне&lt;/a&gt;
            &lt;a href="about.html"&gt;Обо мне&lt;/a&gt;
            &lt;a href="cv.html"&gt;Резюме&lt;/a&gt;
            &lt;div id="lang"&gt;
                &lt;a href="../en/PSKOV_ITEM_URL"&gt;EN&lt;/a&gt;
@@ -189,14 +185,14 @@ item = item.template
 <tbody>
 <tr>
 <td><code>PSKOV_ITEM_URL</code></td>
 <td>Provides <code>&lt;slug&gt;.html</code> value for the page</td>
 <td>Provides generated page's file name: <code>&lt;slug&gt;.html</code></td>
 </tr>
 </tbody>
 </table>
 <p>As you see, <code>PSKOV_ITEM_URL</code> is all you need to have your page in as many languages as you please.</p>
 <p><a name="md"/></p>
 <h2 id="04investigatemarkdownfiles">04. Investigate Markdown files</h2>
 <p><code>en/index.md</code> and <code>en/cv.md</code> files look exactly as <a href="education.03.site.html">before</a>. <code>ru/index.md</code> and <code>ru/cv.md</code> are simply Russian variants of the same pages.</p>
 <p><code>en/about.md</code> and <code>en/cv.md</code> files look almost exactly as <a href="education.03.site.html">before</a>. <code>ru/about.md</code> and <code>ru/cv.md</code> are simply Russian variants of the same pages.</p>
 <p>For example, <code>ru/cv.md</code> has the following contents:</p>
 <pre><code> Title: Резюме
 Slug: cv
@@ -215,17 +211,34 @@ item = item.template
 <p><strong>Note</strong>: Russian page has exactly the same <code>Slug:</code> value as English one.</p>
 <p><a name="gen"/></p>
 <h2 id="05launchlfsaandgeneratethesite">05. Launch LFSA and generate the site</h2>
 <p>Launch LFSA so that it points to directory with the files we just observed:</p>
 <pre><code>$ /path/to/local-file-system-access.py /path/to/dir/02.Language
 <p>Launch <a href="http://opengamestudio.org/lfsa">LFSA</a> so that it points to directory with the files we just observed:</p>
 <pre><code>$ /path/to/lfsa-201905.py /path/to/dir/02.Language
 </code></pre>
 <p>Generate the site:</p>
 <ul>
 <li>Go to <a href="http://opengamestudio.org/pskov">Tool</a> page</li>
 <li>Press <code>Generate</code> button</li>
 <li>Open generated <code>en/index.html</code> or <code>ru/index.html</code> from the site's directory locally</li>
 <li>Open generated <code>en/about.html</code> or <code>ru/about.html</code> from the site's directory locally</li>
 <li>Switch language to verify language selection works fine</li>
 </ul>
 <p>Take time to observe just how little effort you spent to have your web site localized.</p>
 <p><a name="summary"/></p>
 <h2 id="06summary">06. Summary</h2>
 <p>You have successfully added language selection. <a href="http://opengamestudio.org/pskov/sample/02.Language/en/about.html">Check out the result</a>.</p>
 <p>Introduced PSKOV constants include:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_ITEM_URL</code></td>
 <td>Provides generated page's file name: <code>&lt;slug&gt;.html</code></td>
 </tr>
 </tbody>
 </table>
 <p></div><div class="contents"></p>
 <table>
 <thead>
--- a/pskov/en/education.04.lang.md
+++ b/pskov/en/education.04.lang.md
@@ -0,0 +1,187 @@
 Title: Education: 04. Language
 Date: 2019-05-21 00:00
 Category: Page
 Slug: education.04.lang
 Lang: en

 | < Back | Index | Next > |
 |---|---|---|
 | [03. Site][prev] | [Education][index] | [05. Blog][next] |

 </div><div class="contents">

 In this document we add language selection.

 Estimated completion time: 10 minutes.

 **Table of contents**

 * [01. Localization](#localization)
 * [02. Investigate `cfg` file](#cfg)
 * [03. Investigate template files](#item)
 * [04. Investigate Markdown files](#md)
 * [05. Launch LFSA and generate the site](#gen)
 * [06. Summary](#summary)

 <a name="localization"/>

 ## 01. Localization

 Now that you have your web site in English you start to wonder why there's no Russian version, you're Russian after all!

 You set on to create the following [directory structure][02-files]:

 * `cfg`
 * `en/item.template`
 * `en/about.md`
 * `en/cv.md`
 * `ru/item.template`
 * `ru/about.md`
 * `ru/cv.md`

 Let's look at the contents of these files closer.

 <a name="cfg"/>

 ## 02. Investigate `cfg` file

 `cfg` file has the following contents:

 ```
 input = en;ru
 item = item.template
 ```

 As you see, `input` can accept multiple directories separated by `;` symbol: **PSKOV** will go over each directory specified and run as before.

 In this case, both `en/` and `ru/` directories have their own `item.template` file.

 <a name="item"/>

 ## 03. Investigate template files

 * `en/item.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
            <title>Serov</title>
        </head>
        <body>
            <div id="header">
                <strong>Serov</strong>
                <a href="about.html">About me</a>
                <a href="cv.html">CV</a>
                <div id="lang">
                    <a href="../en/PSKOV_ITEM_URL">EN</a>
                    <a href="../ru/PSKOV_ITEM_URL">RU</a>
                </div>
            </div>
            <center>
    - - - - Collapsed for brevity - - - -
    ```
 * `ru/item.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
            <title>Серов</title>
        </head>
        <body>
            <div id="header">
                <strong>Серов</strong>
                <a href="about.html">Обо мне</a>
                <a href="cv.html">Резюме</a>
                <div id="lang">
                    <a href="../en/PSKOV_ITEM_URL">EN</a>
                    <a href="../ru/PSKOV_ITEM_URL">RU</a>
                </div>
            </div>
            <center>
    - - - - Collapsed for brevity - - - -
    ``` 

 **Note**: beginning and ending were collapsed for brevity.

 As you can see, both `en/item.template` and `ru/item.template` look similar to `item.template` we saw [before][prev].

 The changes include:

 * use of `<div id="lang">...</div>` section to present language selection
 * localization of titles into English and Russian

 Language selection uses new **PSKOV** constant:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_URL` | Provides generated page's file name: `<slug>.html` |

 As you see, `PSKOV_ITEM_URL` is all you need to have your page in as many languages as you please.

 <a name="md"/>

 ## 04. Investigate Markdown files

 `en/about.md` and `en/cv.md` files look almost exactly as [before][prev]. `ru/about.md` and `ru/cv.md` are simply Russian variants of the same pages.

 For example, `ru/cv.md` has the following contents:

 ```
 Title: Резюме
 Slug: cv

 Здесь вы можете увидеть моё резюме в том случае, если мои произведения всё ещё вас интересуют. Я использовал современный подход ИТ для структурирования своего резюме в виде пар ключ-значение словаря (карты). Наслаждайтесь!

 | Ключ | Значение |
 |---|---|
 | Имя | Валентин Серов |
 | Возраст | 46 |
 | Семейное положение | Женат |
 | Страна | Российская Империя |
 | Учёба | Императорская Академия художеств |
 | Звания | * академик ИАХ (1898) <br> * действительный член ИАХ (1903) |
 ```

 **Note**: Russian page has exactly the same `Slug:` value as English one.

 <a name="gen"/>

 ## 05. Launch LFSA and generate the site

 Launch [LFSA][lfsa] so that it points to directory with the files we just observed:

 ```
 $ /path/to/lfsa-201905.py /path/to/dir/02.Language
 ```

 Generate the site:

 * Go to [Tool][tool] page
 * Press `Generate` button
 * Open generated `en/about.html` or `ru/about.html` from the site's directory locally
 * Switch language to verify language selection works fine

 <a name="summary"/>

 ## 06. Summary

 You have successfully added language selection. [Check out the result][02-sample].

 Introduced PSKOV constants include:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_URL` | Provides generated page's file name: `<slug>.html` |

 </div><div class="contents">

 | < Back | Index | Next > |
 |---|---|---|
 | [03. Site][prev] | [Education][index] | [05. Blog][next] |

 [index]: education.html
 [prev]: education.03.site.html
 [next]: education.05.blog.html

 [02-files]: https://github.com/OGStudio/site-pskov-sample/tree/master/02.Language
 [02-sample]: http://opengamestudio.org/pskov/sample/02.Language/en/about.html
 [lfsa]: http://opengamestudio.org/lfsa
 [tool]: http://opengamestudio.org/pskov
--- a/pskov/en/education.05.blog.html
+++ b/pskov/en/education.05.blog.html
@@ -0,0 +1,696 @@
 <!DOCTYPE html>
 <html>
    <meta charset="utf-8">
    <head>
        <style>
            #header
            {
                background: #856d51;
                padding: 0.7em;
                text-align: left;
            }
            
            #header a
            {
                color: white;
                text-decoration: none;
                padding: 0.5em 1em 0.5em 1em;
            }
            #title
            {
                color: #433729;
            }
            html
            {
                font-family: sans-serif;
            }
            body
            {
                line-height: 1.5em;
            }
            body
            {
                background: #FAFAFA;
            }
            table
            {
                border-collapse: collapse;
                width: 100%;
            }
            
            table, th, td
            {
                border: 1px solid #aaa;
                padding: 0.5em;
                margin-top: 0.5em;
                margin-bottom: 0.5em;
            }
            code, pre
            {
                font-family: monospace, serif;
                font-size: 1em;
                color: #7f0a0c;
                background: #f5f5f5;
                white-space: pre-wrap;
            }
            .contents
            {
                background: #FFFFFF;
                width: 720px;
                padding: 1em;
                margin-top: 2em;
                margin-bottom: 2em;
                border: 1px solid #E0E0E0;
                text-align: left;
                color: #444;
            }
        </style>
        <title>
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
 Education: 05. Blog
        </h1></center>
        <center><div class="contents">
 <table>
 <thead>
 <tr>
 <th>&lt; Back</th>
 <th>Index</th>
 <th>Next &gt;</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><a href="education.04.lang.html">04. Language</a></td>
 <td><a href="education.html">Education</a></td>
 <td>Not available</td>
 </tr>
 </tbody>
 </table>
 <p></div><div class="contents"></p>
 <p>In this document we create "dynamic" pages like blog posts.</p>
 <p>Estimated completion time: 20 minutes.</p>
 <p><strong>Table of contents</strong></p>
 <ul>
 <li><a href="#blog">01. Blog</a></li>
 <li><a href="#cfg">02. Investigate <code>cfg</code> file</a></li>
 <li><a href="#item">03. Investigate item templates of the blog</a></li>
 <li><a href="#preview">04. Investigate preview templates</a></li>
 <li><a href="#index">05. Investigate index (summary) templates</a></li>
 <li><a href="#pagination">06. Investigate pagination templates</a></li>
 <li><a href="#md">07. Investigate Markdown files</a></li>
 <li><a href="#gen">08. Launch LFSA and generate the site</a></li>
 <li><a href="#summary">09. Summary</a></li>
 </ul>
 <p><a name="blog"/></p>
 <h2 id="01blog">01. Blog</h2>
 <p>So, you have your web site in both English and Russian. You start to feel the need to constantly share your thoughts with the world as blog posts.</p>
 <p>You set on to create the following <a href="https://github.com/OGStudio/site-pskov-sample/tree/master/03.Blog">directory structure</a>:</p>
 <ul>
 <li><code>cfg</code></li>
 <li><code>en/blog/</code><ul>
 <li><code>item.template</code></li>
 <li><code>index.template</code></li>
 <li><code>preview.template</code></li>
 <li><code>pagination.template</code></li>
 <li><code>pagination.prev.template</code></li>
 <li><code>pagination.next.template</code></li>
 <li><code>1885.md</code></li>
 <li><code>1886.01.md</code></li>
 <li><code>1886.02.md</code></li>
 <li><code>1887.01.md</code></li>
 <li><code>1887.02.md</code></li>
 <li><code>1888.md</code></li>
 <li><code>1896.md</code></li>
 <li><code>1899.md</code></li></ul></li>
 <li><code>en/page/</code><ul>
 <li><code>item.template</code></li>
 <li><code>about.md</code></li>
 <li><code>cv.md</code></li></ul></li>
 <li><code>ru/blog/</code><ul>
 <li><code>item.template</code></li>
 <li><code>index.template</code></li>
 <li><code>preview.template</code></li>
 <li><code>pagination.template</code></li>
 <li><code>pagination.prev.template</code></li>
 <li><code>pagination.next.template</code></li>
 <li><code>1885.md</code></li>
 <li><code>1886.01.md</code></li>
 <li><code>1886.02.md</code></li>
 <li><code>1887.01.md</code></li>
 <li><code>1887.02.md</code></li>
 <li><code>1888.md</code></li>
 <li><code>1896.md</code></li>
 <li><code>1899.md</code></li></ul></li>
 <li><code>ru/page/</code><ul>
 <li><code>item.template</code></li>
 <li><code>about.md</code></li>
 <li><code>cv.md</code></li></ul></li>
 </ul>
 <p>Let's look at the contents of these files closer.</p>
 <p><a name="cfg"/></p>
 <h2 id="02investigatecfgfile">02. Investigate <code>cfg</code> file</h2>
 <p><code>cfg</code> file has the following contents:</p>
 <pre><code>input = en/page;ru/page;en/blog;ru/blog
 item = item.template
 preview = preview.template
 index = index.template
 paginationPrev = pagination.prev.template
 paginationNext = pagination.next.template
 paginationPrevNext = pagination.template
 previewSize = 200
 previewEnding = . . .
 previewsPerPage = 3
 previewPageBaseName = index
 </code></pre>
 <p>Apart from already used <code>input</code> and <code>item</code> keys, we have quite a lot of new ones. Let's break them down:</p>
 <table>
 <thead>
 <tr>
 <th>Key</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>preview</code></td>
 <td>Points to an HTML template file that is used to generate HTML previews out of the first <code>previewSize</code> (approximately) characters of Markdown files</td>
 </tr>
 <tr>
 <td><code>index</code></td>
 <td>Points to an HTML template file that is used to generate HTML index (summary) files to host previews</td>
 </tr>
 <tr>
 <td><code>paginationPrev</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by the <em>last</em> index (summary) file</td>
 </tr>
 <tr>
 <td><code>paginationNext</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by the <em>first</em> index (summary) file</td>
 </tr>
 <tr>
 <td><code>paginationPrevNext</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by index (summary) files <em>except the ones at the beginning and at the end</em></td>
 </tr>
 <tr>
 <td><code>previewSize</code></td>
 <td>How many characters (approximately) to take out of a Markdown file to generate an HTML preview</td>
 </tr>
 <tr>
 <td><code>previewEnding</code></td>
 <td>String to use at the end of HTML previews</td>
 </tr>
 <tr>
 <td><code>previewsPerPage</code></td>
 <td>Number of HTML previews hosted by single index (summary) file</td>
 </tr>
 <tr>
 <td><code>previewsPageBaseName</code></td>
 <td>Index (summary) file base name</td>
 </tr>
 </tbody>
 </table>
 <p>In our case:</p>
 <ul>
 <li>we restrict previews to <code>200</code> characters in size (approximately)</li>
 <li>we use <code>. . .</code> string at the end of each preview</li>
 <li>index (summary) files host <code>3</code> previews maximum</li>
 <li>index (summary) files are saved as <code>index.html</code>, <code>index2.html</code>, <code>index3.html</code>, etc.</li>
 </ul>
 <p><a name="item"/></p>
 <h2 id="03investigateitemtemplatesoftheblog">03. Investigate item templates of the blog</h2>
 <ul>
 <li><p><code>en/blog/item.template</code> contents:</p>
 <pre><code>- - - - Collapsed for brevity - - - -
 &lt;body&gt;
    &lt;div id="header"&gt;
        &lt;strong&gt;Serov&lt;/strong&gt;
        &lt;a href="../../en/blog/index.html"&gt;Blog&lt;/a&gt;
        &lt;a href="../../en/page/about.html"&gt;About me&lt;/a&gt;
        &lt;a href="../../en/page/cv.html"&gt;CV&lt;/a&gt;
        &lt;div id="lang"&gt;
            &lt;a href="../../en/blog/PSKOV_ITEM_URL"&gt;EN&lt;/a&gt;
            &lt;a href="../../ru/blog/PSKOV_ITEM_URL"&gt;RU&lt;/a&gt;
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;center&gt;
        &lt;h1&gt;In the blog...&lt;/h1&gt;
        &lt;div class="contents"&gt;
            &lt;h2 class="itemTitle"&gt;
                &lt;a href="PSKOV_ITEM_URL"&gt;PSKOV_ITEM_TITLE&lt;/a&gt;
            &lt;/h2&gt;
            &lt;p class="itemDate"&gt;PSKOV_ITEM_DATE&lt;/p&gt;
 PSKOV_ITEM_CONTENTS
        &lt;/div&gt;
        &lt;div id="footer"&gt;
            This sample web site has been generated by &lt;a href="http://opengamestudio.org/pskov"&gt;PSKOV&lt;/a&gt;.
        &lt;/div&gt;
    &lt;/center&gt;
 &lt;/body&gt;
 - - - - Collapsed for brevity - - - -
 </code></pre></li>
 <li><p><code>ru/blog/item.template</code> contents:</p>
 <pre><code>- - - - Collapsed for brevity - - - -
 &lt;body&gt;
    &lt;div id="header"&gt;
        &lt;strong&gt;Серов&lt;/strong&gt;
        &lt;a href="../../ru/blog/index.html"&gt;Блог&lt;/a&gt;
        &lt;a href="../../ru/page/about.html"&gt;Обо мне&lt;/a&gt;
        &lt;a href="../../ru/page/cv.html"&gt;Резюме&lt;/a&gt;
        &lt;div id="lang"&gt;
            &lt;a href="../../en/blog/PSKOV_ITEM_URL"&gt;EN&lt;/a&gt;
            &lt;a href="../../ru/blog/PSKOV_ITEM_URL"&gt;RU&lt;/a&gt;
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;center&gt;
        &lt;h1&gt;В блоге...&lt;/h1&gt;
        &lt;div class="contents"&gt;
            &lt;h2 class="itemTitle"&gt;
                &lt;a href="PSKOV_ITEM_URL"&gt;PSKOV_ITEM_TITLE&lt;/a&gt;
            &lt;/h2&gt;
            &lt;p class="itemDate"&gt;PSKOV_ITEM_DATE&lt;/p&gt;
 PSKOV_ITEM_CONTENTS
        &lt;/div&gt;
        &lt;div id="footer"&gt;
            Этот пример сайта сгенерирован &lt;a href="http://opengamestudio.org/pskov"&gt;ПСКОВОМ&lt;/a&gt;.
        &lt;/div&gt;
    &lt;/center&gt;
 &lt;/body&gt;
 - - - - Collapsed for brevity - - - -
 </code></pre></li>
 </ul>
 <p><strong>Note</strong>: beginning and ending were collapsed for brevity.</p>
 <p>As you can see, both files look similar to <code>item.template</code> files we saw <a href="education.04.lang.html">before</a>.</p>
 <p>The changes include:</p>
 <ul>
 <li>new URLs to reference pages in <code>page</code> directory and first index (summary) file in <code>blog</code> directory</li>
 <li>title is now referenced inside <code>contents</code> section as a link to complete page</li>
 <li>date is referenced to highlight relationship among different blog posts in time</li>
 </ul>
 <p>Date reference uses new <code>PSKOV_ITEM_DATE</code> constant:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_ITEM_DATE</code></td>
 <td>Provides date from <code>Date:</code> part of page's header section</td>
 </tr>
 </tbody>
 </table>
 <p><a name="preview"/></p>
 <h2 id="04investigatepreviewtemplates">04. Investigate preview templates</h2>
 <ul>
 <li><p><code>en/blog/preview.template</code> contents:</p>
 <pre><code>&lt;div class="contents"&gt;
    &lt;h2 class="itemTitle"&gt;
        &lt;a href="PSKOV_ITEM_URL"&gt;PSKOV_ITEM_TITLE&lt;/a&gt;
    &lt;/h2&gt;
    &lt;p class="itemDate"&gt;PSKOV_ITEM_DATE&lt;/p&gt;
 PSKOV_PREVIEW
    &lt;div class="itemMore"&gt;
        &lt;a href="PSKOV_ITEM_URL"&gt;Continue reading&lt;/a&gt;
    &lt;/div&gt;
 &lt;/div&gt;
 </code></pre></li>
 <li><p><code>ru/blog/preview.template</code> contents:</p>
 <pre><code>&lt;div class="contents"&gt;
    &lt;h2 class="itemTitle"&gt;
        &lt;a href="PSKOV_ITEM_URL"&gt;PSKOV_ITEM_TITLE&lt;/a&gt;
    &lt;/h2&gt;
    &lt;p class="itemDate"&gt;PSKOV_ITEM_DATE&lt;/p&gt;
 PSKOV_PREVIEW
    &lt;div class="itemMore"&gt;
        &lt;a href="PSKOV_ITEM_URL"&gt;Читать дальше&lt;/a&gt;
    &lt;/div&gt;
 &lt;/div&gt;
 </code></pre></li>
 </ul>
 <p>Previews have no <code>&lt;head&gt;</code>, <code>&lt;body&gt;</code>, and similar full page HTML tags. Previews represent sections inserted into index (summary) files.</p>
 <p>Preview itself is referenced by <code>PSKOV_PREVIEW</code> constant:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_PREVIEW</code></td>
 <td>Provides contents from a Markdown file limited by <code>previewSize</code> characters (approximately)</td>
 </tr>
 </tbody>
 </table>
 <p><a name="index"/></p>
 <h2 id="05investigateindexsummarytemplates">05. Investigate index (summary) templates</h2>
 <ul>
 <li><p><code>en/blog/index.template</code> contents:</p>
 <pre><code>- - - - Collapsed for brevity - - - -
 &lt;body&gt;
    &lt;div id="header"&gt;
        &lt;strong&gt;Serov&lt;/strong&gt;
        &lt;a href="../../en/blog/index.html"&gt;Blog&lt;/a&gt;
        &lt;a href="../../en/page/about.html"&gt;About me&lt;/a&gt;
        &lt;a href="../../en/page/cv.html"&gt;CV&lt;/a&gt;
        &lt;div id="lang"&gt;
            &lt;a href="../../en/blog/PSKOV_INDEX_URL"&gt;EN&lt;/a&gt;
            &lt;a href="../../ru/blog/PSKOV_INDEX_URL"&gt;RU&lt;/a&gt;
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;center&gt;
        &lt;h1&gt;Blog&lt;/h1&gt;
 PSKOV_PREVIEWS
 PSKOV_PAGINATION
        &lt;div id="footer"&gt;
            This sample web site has been generated by &lt;a href="http://opengamestudio.org/pskov"&gt;PSKOV&lt;/a&gt;.
        &lt;/div&gt;
    &lt;/center&gt;
 &lt;/body&gt;
 - - - - Collapsed for brevity - - - -
 </code></pre></li>
 <li><p><code>ru/blog/index.template</code> contents:</p>
 <pre><code>- - - - Collapsed for brevity - - - -
 &lt;body&gt;
    &lt;div id="header"&gt;
        &lt;strong&gt;Серов&lt;/strong&gt;
        &lt;a href="../../ru/blog/index.html"&gt;Блог&lt;/a&gt;
        &lt;a href="../../ru/page/about.html"&gt;Обо мне&lt;/a&gt;
        &lt;a href="../../ru/page/cv.html"&gt;Резюме&lt;/a&gt;
        &lt;div id="lang"&gt;
            &lt;a href="../../en/blog/PSKOV_INDEX_URL"&gt;EN&lt;/a&gt;
            &lt;a href="../../ru/blog/PSKOV_INDEX_URL"&gt;RU&lt;/a&gt;
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;center&gt;
        &lt;h1&gt;Блог&lt;/h1&gt;
 PSKOV_PREVIEWS
 PSKOV_PAGINATION
        &lt;div id="footer"&gt;
            Этот пример сайта сгенерирован &lt;a href="http://opengamestudio.org/pskov"&gt;ПСКОВОМ&lt;/a&gt;.
        &lt;/div&gt;
    &lt;/center&gt;
 &lt;/body&gt;
 - - - - Collapsed for brevity - - - -
 </code></pre></li>
 </ul>
 <p><strong>Notes</strong>:</p>
 <ul>
 <li>beginning and ending were collapsed for brevity</li>
 <li><code>PSKOV_INDEX_URL</code> constant is used to provide language selection</li>
 </ul>
 <p>Index (summary) files are used to host previews.</p>
 <p>Here are new <strong>PSKOV</strong> constants explained:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_INDEX_URL</code></td>
 <td>Provides generated page's file name: <code>&lt;previewsPageBaseName&gt;&lt;id&gt;.html</code></td>
 </tr>
 <tr>
 <td><code>PSKOV_PREVIEWS</code></td>
 <td>Provides a combination of <code>PSKOV_PREVIEW</code> sections</td>
 </tr>
 <tr>
 <td><code>PSKOV_PAGINATION</code></td>
 <td>Provides pagination section to navigate index (summary) pages</td>
 </tr>
 </tbody>
 </table>
 <p><a name="pagination"/></p>
 <h2 id="06investigatepaginationtemplates">06. Investigate pagination templates</h2>
 <p>Pagination templates represent sections used to navigate index (summary) pages.</p>
 <p>There are free pagination templates:</p>
 <table>
 <thead>
 <tr>
 <th>Pagination template</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>prev</td>
 <td>Is used for the last index (summary) page because we can only go backwards</td>
 </tr>
 <tr>
 <td>next</td>
 <td>Is used for the first index (summary) page because we can only go forward</td>
 </tr>
 <tr>
 <td>both</td>
 <td>Is used for intermediate index (summary) pages because we can either go backwards, or forward</td>
 </tr>
 </tbody>
 </table>
 <p>Let's look at English pagination templates:</p>
 <ul>
 <li><p><code>en/blog/pagination.prev.template</code> contents:</p>
 <pre><code>&lt;p&gt;Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT&lt;/p&gt;
 &lt;p&gt;
    &lt;a href="PSKOV_PREV_PAGE_URL"&gt;« Newer&lt;/a&gt;
 &lt;/p&gt;
 </code></pre></li>
 <li><p><code>en/blog/pagination.next.template</code> contents:</p>
 <pre><code>&lt;p&gt;Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT&lt;/p&gt;
 &lt;p&gt;
    &lt;a href="PSKOV_NEXT_PAGE_URL"&gt;Older »&lt;/a&gt;
 &lt;/p&gt;
 </code></pre></li>
 <li><p><code>en/blog/pagination.template</code> contents:</p>
 <pre><code>&lt;p&gt;Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT&lt;/p&gt;
 &lt;p&gt;
    &lt;a href="PSKOV_PREV_PAGE_URL"&gt;« Newer&lt;/a&gt;
    &lt;a href="PSKOV_NEXT_PAGE_URL"&gt;Older »&lt;/a&gt;
 &lt;/p&gt;
 </code></pre></li>
 </ul>
 <p>Russian counterparts look similar. Here's <code>ru/blog/pagination.template</code> contents:</p>
 <pre><code>&lt;p&gt;Страница PSKOV_PAGE_ID из PSKOV_PAGES_COUNT&lt;/p&gt;
 &lt;p&gt;
    &lt;a href="PSKOV_PREV_PAGE_URL"&gt;« Новее&lt;/a&gt;
    &lt;a href="PSKOV_NEXT_PAGE_URL"&gt;Старее »&lt;/a&gt;
 &lt;/p&gt;
 </code></pre>
 <p>Here are new <strong>PSKOV</strong> constants we used:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_PAGE_ID</code></td>
 <td>Provides index (summary) page id starting from <code>1</code></td>
 </tr>
 <tr>
 <td><code>PSKOV_PAGES_COUNT</code></td>
 <td>Provides total number of index (summary) pages generated</td>
 </tr>
 <tr>
 <td><code>PSKOV_PREV_PAGE_URL</code></td>
 <td>Provides previous index (summary) page file name</td>
 </tr>
 <tr>
 <td><code>PSKOV_NEXT_PAGE_URL</code></td>
 <td>Provides next index (summary) page file name</td>
 </tr>
 </tbody>
 </table>
 <p><a name="md"/></p>
 <h2 id="07investigatemarkdownfiles">07. Investigate Markdown files</h2>
 <p>Markdown files represent blog posts and they look almost like Markdown files for pages. Here's <code>en/blog/1885.md</code> contents:</p>
 <pre><code> Title: Bullocks
 Date: 1885
 Slug: 1885.01.bullocks

 ![Bullocks][bullocks]

 I've been painting "Bullocks" sketch while I was staying in Odessa at Kuznetsov's in 1885.

 [bullocks]: https://upload.wikimedia.org/wikipedia/commons/c/cb/Walentin_Aleksandrovich_Serov_Bullocks.jpg
 </code></pre>
 <p>Date is used to sort blog posts by date in ascending order:</p>
 <table>
 <thead>
 <tr>
 <th>Header constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>Date:</code></td>
 <td>Provides value for <code>PSKOV_ITEM_DATE</code> constant when generating HTML out of Markdown</td>
 </tr>
 </tbody>
 </table>
 <p><a name="gen"/></p>
 <h2 id="08launchlfsaandgeneratethesite">08. Launch LFSA and generate the site</h2>
 <p>Launch <a href="http://opengamestudio.org/lfsa">LFSA</a> so that it points to directory with the files we just observed:</p>
 <pre><code>$ /path/to/lfsa-201905.py /path/to/dir/03.Blog
 </code></pre>
 <p>Generate the site:</p>
 <ul>
 <li>Go to <a href="http://opengamestudio.org/pskov">Tool</a> page</li>
 <li>Press <code>Generate</code> button</li>
 <li>Open generated <code>en/blog/index.html</code> or <code>ru/blog/index.html</code> from the site's directory locally</li>
 <li>Navigate index (summary) pages to make sure everything works fine</li>
 </ul>
 <p><a name="summary"/></p>
 <h2 id="09summary">09. Summary</h2>
 <p>You have successfully generated a web site with "constant" and "dynamic" pages. <a href="http://opengamestudio.org/pskov/sample/03.Blog/en/blog/index.html">Check out the result</a>.</p>
 <p>Introduced PSKOV constants include:</p>
 <table>
 <thead>
 <tr>
 <th>PSKOV constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>PSKOV_ITEM_DATE</code></td>
 <td>Provides date from <code>Date:</code> part of page's header section</td>
 </tr>
 <tr>
 <td><code>PSKOV_PREVIEW</code></td>
 <td>Provides contents from a Markdown file limited by <code>previewSize</code> characters (approximately)</td>
 </tr>
 <tr>
 <td><code>PSKOV_INDEX_URL</code></td>
 <td>Provides generated page's file name: <code>&lt;previewsPageBaseName&gt;&lt;id&gt;.html</code></td>
 </tr>
 <tr>
 <td><code>PSKOV_PREVIEWS</code></td>
 <td>Provides a combination of <code>PSKOV_PREVIEW</code> sections</td>
 </tr>
 <tr>
 <td><code>PSKOV_PAGINATION</code></td>
 <td>Provides pagination section to navigate index (summary) pages</td>
 </tr>
 <tr>
 <td><code>PSKOV_PAGE_ID</code></td>
 <td>Provides index (summary) page id starting from <code>1</code></td>
 </tr>
 <tr>
 <td><code>PSKOV_PAGES_COUNT</code></td>
 <td>Provides total number of index (summary) pages generated</td>
 </tr>
 <tr>
 <td><code>PSKOV_PREV_PAGE_URL</code></td>
 <td>Provides previous index (summary) page file name</td>
 </tr>
 <tr>
 <td><code>PSKOV_NEXT_PAGE_URL</code></td>
 <td>Provides next index (summary) page file name</td>
 </tr>
 </tbody>
 </table>
 <p>Introduced configuration keys include:</p>
 <table>
 <thead>
 <tr>
 <th>Key</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>preview</code></td>
 <td>Points to an HTML template file that is used to generate HTML previews out of the first <code>previewSize</code> (approximately) characters of Markdown files</td>
 </tr>
 <tr>
 <td><code>index</code></td>
 <td>Points to an HTML template file that is used to generate HTML index (summary) files to host previews</td>
 </tr>
 <tr>
 <td><code>paginationPrev</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by the <em>last</em> index (summary) file</td>
 </tr>
 <tr>
 <td><code>paginationNext</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by the <em>first</em> index (summary) file</td>
 </tr>
 <tr>
 <td><code>paginationPrevNext</code></td>
 <td>Points to an HTML template file that is used to generate pagination section used by index (summary) files <em>except the ones at the beginning and at the end</em></td>
 </tr>
 <tr>
 <td><code>previewSize</code></td>
 <td>How many characters (approximately) to take out of a Markdown file to generate an HTML preview</td>
 </tr>
 <tr>
 <td><code>previewEnding</code></td>
 <td>String to use at the end of HTML previews</td>
 </tr>
 <tr>
 <td><code>previewsPerPage</code></td>
 <td>Number of HTML previews hosted by single index (summary) file</td>
 </tr>
 <tr>
 <td><code>previewsPageBaseName</code></td>
 <td>Index (summary) file base name</td>
 </tr>
 </tbody>
 </table>
 <p>Introduced header constants include:</p>
 <table>
 <thead>
 <tr>
 <th>Header constant</th>
 <th>Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><code>Date:</code></td>
 <td>Provides value for <code>PSKOV_ITEM_DATE</code> constant when generating HTML out of Markdown</td>
 </tr>
 </tbody>
 </table>
 <p>This was the final document to make you proficient in generating static sites with <strong>PSKOV</strong>. If you like what we do, support us by joining our group at <a href="https://twitter.com/OpenGameStudio">Twitter</a>, <a href="https://www.facebook.com/groups/162611230470183">Facebook</a>, or <a href="https://vk.com/opengamestudo">VK</a>.</p>
 <p>Now use <strong>PSKOV</strong> to generate your very own web site!</p>
 <p></div><div class="contents"></p>
 <table>
 <thead>
 <tr>
 <th>&lt; Back</th>
 <th>Index</th>
 <th>Next &gt;</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td><a href="education.04.lang.html">04. Language</a></td>
 <td><a href="education.html">Education</a></td>
 <td>Not available</td>
 </tr>
 </tbody>
 </table>
        </div></center>
        <script type="text/javascript">
        </script>
    </body>
 </html>

--- a/pskov/en/education.05.blog.md
+++ b/pskov/en/education.05.blog.md
@@ -0,0 +1,482 @@
 Title: Education: 05. Blog
 Date: 2019-05-22 00:00
 Category: Page
 Slug: education.05.blog
 Lang: en

 | < Back | Index | Next > |
 |---|---|---|
 | [04. Language][prev] | [Education][index] | Not available |

 </div><div class="contents">

 In this document we create "dynamic" pages like blog posts.

 Estimated completion time: 20 minutes.

 **Table of contents**

 * [01. Blog](#blog)
 * [02. Investigate `cfg` file](#cfg)
 * [03. Investigate item templates of the blog](#item)
 * [04. Investigate preview templates](#preview)
 * [05. Investigate index (summary) templates](#index)
 * [06. Investigate pagination templates](#pagination)
 * [07. Investigate Markdown files](#md)
 * [08. Launch LFSA and generate the site](#gen)
 * [09. Summary](#summary)

 <a name="blog"/>

 ## 01. Blog

 So, you have your web site in both English and Russian. You start to feel the need to constantly share your thoughts with the world as blog posts.

 You set on to create the following [directory structure][03-files]:

 * `cfg`
 * `en/blog/`
    * `item.template`
    * `index.template`
    * `preview.template`
    * `pagination.template`
    * `pagination.prev.template`
    * `pagination.next.template`
    * `1885.md`
    * `1886.01.md`
    * `1886.02.md`
    * `1887.01.md`
    * `1887.02.md`
    * `1888.md`
    * `1896.md`
    * `1899.md`
 * `en/page/`
    * `item.template`
    * `about.md`
    * `cv.md`
 * `ru/blog/`
    * `item.template`
    * `index.template`
    * `preview.template`
    * `pagination.template`
    * `pagination.prev.template`
    * `pagination.next.template`
    * `1885.md`
    * `1886.01.md`
    * `1886.02.md`
    * `1887.01.md`
    * `1887.02.md`
    * `1888.md`
    * `1896.md`
    * `1899.md`
 * `ru/page/`
    * `item.template`
    * `about.md`
    * `cv.md`

 Let's look at the contents of these files closer.

 <a name="cfg"/>

 ## 02. Investigate `cfg` file

 `cfg` file has the following contents:

 ```
 input = en/page;ru/page;en/blog;ru/blog
 item = item.template
 preview = preview.template
 index = index.template
 paginationPrev = pagination.prev.template
 paginationNext = pagination.next.template
 paginationPrevNext = pagination.template
 previewSize = 200
 previewEnding = . . .
 previewsPerPage = 3
 previewPageBaseName = index
 ```

 Apart from already used `input` and `item` keys, we have quite a lot of new ones. Let's break them down:

 | Key | Description |
 |---|---|
 | `preview` | Points to an HTML template file that is used to generate HTML previews out of the first `previewSize` (approximately) characters of Markdown files |
 | `index` | Points to an HTML template file that is used to generate HTML index (summary) files to host previews |
 | `paginationPrev` | Points to an HTML template file that is used to generate pagination section used by the *last* index (summary) file |
 | `paginationNext` | Points to an HTML template file that is used to generate pagination section used by the *first* index (summary) file |
 | `paginationPrevNext` | Points to an HTML template file that is used to generate pagination section used by index (summary) files *except the ones at the beginning and at the end* |
 | `previewSize` | How many characters (approximately) to take out of a Markdown file to generate an HTML preview |
 | `previewEnding` | String to use at the end of HTML previews |
 | `previewsPerPage` | Number of HTML previews hosted by single index (summary) file |
 | `previewsPageBaseName` | Index (summary) file base name |

 In our case:

 * we restrict previews to `200` characters in size (approximately)
 * we use `. . .` string at the end of each preview
 * index (summary) files host `3` previews maximum
 * index (summary) files are saved as `index.html`, `index2.html`, `index3.html`, etc.

 <a name="item"/>

 ## 03. Investigate item templates of the blog

 * `en/blog/item.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
    <body>
        <div id="header">
            <strong>Serov</strong>
            <a href="../../en/blog/index.html">Blog</a>
            <a href="../../en/page/about.html">About me</a>
            <a href="../../en/page/cv.html">CV</a>
            <div id="lang">
                <a href="../../en/blog/PSKOV_ITEM_URL">EN</a>
                <a href="../../ru/blog/PSKOV_ITEM_URL">RU</a>
            </div>
        </div>
        <center>
            <h1>In the blog...</h1>
            <div class="contents">
                <h2 class="itemTitle">
                    <a href="PSKOV_ITEM_URL">PSKOV_ITEM_TITLE</a>
                </h2>
                <p class="itemDate">PSKOV_ITEM_DATE</p>
 PSKOV_ITEM_CONTENTS
            </div>
            <div id="footer">
                This sample web site has been generated by <a href="http://opengamestudio.org/pskov">PSKOV</a>.
            </div>
        </center>
    </body>
    - - - - Collapsed for brevity - - - -
    ```
 * `ru/blog/item.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
    <body>
        <div id="header">
            <strong>Серов</strong>
            <a href="../../ru/blog/index.html">Блог</a>
            <a href="../../ru/page/about.html">Обо мне</a>
            <a href="../../ru/page/cv.html">Резюме</a>
            <div id="lang">
                <a href="../../en/blog/PSKOV_ITEM_URL">EN</a>
                <a href="../../ru/blog/PSKOV_ITEM_URL">RU</a>
            </div>
        </div>
        <center>
            <h1>В блоге...</h1>
            <div class="contents">
                <h2 class="itemTitle">
                    <a href="PSKOV_ITEM_URL">PSKOV_ITEM_TITLE</a>
                </h2>
                <p class="itemDate">PSKOV_ITEM_DATE</p>
 PSKOV_ITEM_CONTENTS
            </div>
            <div id="footer">
                Этот пример сайта сгенерирован <a href="http://opengamestudio.org/pskov">ПСКОВОМ</a>.
            </div>
        </center>
    </body>
    - - - - Collapsed for brevity - - - -
    ``` 

 **Note**: beginning and ending were collapsed for brevity.

 As you can see, both files look similar to `item.template` files we saw [before][prev].

 The changes include:

 * new URLs to reference pages in `page` directory and first index (summary) file in `blog` directory
 * title is now referenced inside `contents` section as a link to complete page
 * date is referenced to highlight relationship among different blog posts in time

 Date reference uses new `PSKOV_ITEM_DATE` constant:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_DATE` | Provides date from `Date:` part of page's header section |

 <a name="preview"/>

 ## 04. Investigate preview templates

 * `en/blog/preview.template` contents:

    ```
    <div class="contents">
        <h2 class="itemTitle">
            <a href="PSKOV_ITEM_URL">PSKOV_ITEM_TITLE</a>
        </h2>
        <p class="itemDate">PSKOV_ITEM_DATE</p>
    PSKOV_PREVIEW
        <div class="itemMore">
            <a href="PSKOV_ITEM_URL">Continue reading</a>
        </div>
    </div>
    ```

 * `ru/blog/preview.template` contents:

    ```
    <div class="contents">
        <h2 class="itemTitle">
            <a href="PSKOV_ITEM_URL">PSKOV_ITEM_TITLE</a>
        </h2>
        <p class="itemDate">PSKOV_ITEM_DATE</p>
    PSKOV_PREVIEW
        <div class="itemMore">
            <a href="PSKOV_ITEM_URL">Читать дальше</a>
        </div>
    </div>
    ```

 Previews have no `<head>`, `<body>`, and similar full page HTML tags. Previews represent sections inserted into index (summary) files.

 Preview itself is referenced by `PSKOV_PREVIEW` constant:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_PREVIEW` | Provides contents from a Markdown file limited by `previewSize` characters (approximately) |

 <a name="index"/>

 ## 05. Investigate index (summary) templates

 * `en/blog/index.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
    <body>
        <div id="header">
            <strong>Serov</strong>
            <a href="../../en/blog/index.html">Blog</a>
            <a href="../../en/page/about.html">About me</a>
            <a href="../../en/page/cv.html">CV</a>
            <div id="lang">
                <a href="../../en/blog/PSKOV_INDEX_URL">EN</a>
                <a href="../../ru/blog/PSKOV_INDEX_URL">RU</a>
            </div>
        </div>
        <center>
            <h1>Blog</h1>
    PSKOV_PREVIEWS
    PSKOV_PAGINATION
            <div id="footer">
                This sample web site has been generated by <a href="http://opengamestudio.org/pskov">PSKOV</a>.
            </div>
        </center>
    </body>
    - - - - Collapsed for brevity - - - -
    ```

 * `ru/blog/index.template` contents:

    ```
    - - - - Collapsed for brevity - - - -
    <body>
        <div id="header">
            <strong>Серов</strong>
            <a href="../../ru/blog/index.html">Блог</a>
            <a href="../../ru/page/about.html">Обо мне</a>
            <a href="../../ru/page/cv.html">Резюме</a>
            <div id="lang">
                <a href="../../en/blog/PSKOV_INDEX_URL">EN</a>
                <a href="../../ru/blog/PSKOV_INDEX_URL">RU</a>
            </div>
        </div>
        <center>
            <h1>Блог</h1>
    PSKOV_PREVIEWS
    PSKOV_PAGINATION
            <div id="footer">
                Этот пример сайта сгенерирован <a href="http://opengamestudio.org/pskov">ПСКОВОМ</a>.
            </div>
        </center>
    </body>
    - - - - Collapsed for brevity - - - -
    ```

 **Notes**:

 * beginning and ending were collapsed for brevity
 * `PSKOV_INDEX_URL` constant is used to provide language selection

 Index (summary) files are used to host previews.

 Here are new **PSKOV** constants explained:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_INDEX_URL` | Provides generated page's file name: `<previewsPageBaseName><id>.html` |
 | `PSKOV_PREVIEWS` | Provides a combination of `PSKOV_PREVIEW` sections |
 | `PSKOV_PAGINATION` | Provides pagination section to navigate index (summary) pages |

 <a name="pagination"/>

 ## 06. Investigate pagination templates

 Pagination templates represent sections used to navigate index (summary) pages.

 There are free pagination templates:

 | Pagination template | Description |
 |---|---|
 | prev | Is used for the last index (summary) page because we can only go backwards |
 | next | Is used for the first index (summary) page because we can only go forward |
 | both | Is used for intermediate index (summary) pages because we can either go backwards, or forward |

 Let's look at English pagination templates:

 * `en/blog/pagination.prev.template` contents:

    ```
    <p>Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT</p>
    <p>
        <a href="PSKOV_PREV_PAGE_URL">« Newer</a>
    </p>
    ```

 * `en/blog/pagination.next.template` contents:

    ```
    <p>Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT</p>
    <p>
        <a href="PSKOV_NEXT_PAGE_URL">Older »</a>
    </p>
    ```

 * `en/blog/pagination.template` contents:

    ```
    <p>Page PSKOV_PAGE_ID of PSKOV_PAGES_COUNT</p>
    <p>
        <a href="PSKOV_PREV_PAGE_URL">« Newer</a>
        <a href="PSKOV_NEXT_PAGE_URL">Older »</a>
    </p>
    ```

 Russian counterparts look similar. Here's `ru/blog/pagination.template` contents:

 ```
 <p>Страница PSKOV_PAGE_ID из PSKOV_PAGES_COUNT</p>
 <p>
    <a href="PSKOV_PREV_PAGE_URL">« Новее</a>
    <a href="PSKOV_NEXT_PAGE_URL">Старее »</a>
 </p>
 ```

 Here are new **PSKOV** constants we used:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_PAGE_ID` | Provides index (summary) page id starting from `1` |
 | `PSKOV_PAGES_COUNT` | Provides total number of index (summary) pages generated |
 | `PSKOV_PREV_PAGE_URL` | Provides previous index (summary) page file name |
 | `PSKOV_NEXT_PAGE_URL` | Provides next index (summary) page file name |

 <a name="md"/>

 ## 07. Investigate Markdown files

 Markdown files represent blog posts and they look almost like Markdown files for pages. Here's `en/blog/1885.md` contents:

 ```
 Title: Bullocks
 Date: 1885
 Slug: 1885.01.bullocks

 ![Bullocks][bullocks]

 I've been painting "Bullocks" sketch while I was staying in Odessa at Kuznetsov's in 1885.

 [bullocks]: https://upload.wikimedia.org/wikipedia/commons/c/cb/Walentin_Aleksandrovich_Serov_Bullocks.jpg
 ```

 Date is used to sort blog posts by date in ascending order:

 | Header constant | Description |
 |---|---|
 | `Date:` | Provides value for `PSKOV_ITEM_DATE` constant when generating HTML out of Markdown |

 <a name="gen"/>

 ## 08. Launch LFSA and generate the site

 Launch [LFSA][lfsa] so that it points to directory with the files we just observed:

 ```
 $ /path/to/lfsa-201905.py /path/to/dir/03.Blog
 ```

 Generate the site:

 * Go to [Tool][tool] page
 * Press `Generate` button
 * Open generated `en/blog/index.html` or `ru/blog/index.html` from the site's directory locally
 * Navigate index (summary) pages to make sure everything works fine

 <a name="summary"/>

 ## 09. Summary

 You have successfully generated a web site with "constant" and "dynamic" pages. [Check out the result][03-sample].

 Introduced PSKOV constants include:

 | PSKOV constant | Description |
 |---|---|
 | `PSKOV_ITEM_DATE` | Provides date from `Date:` part of page's header section |
 | `PSKOV_PREVIEW` | Provides contents from a Markdown file limited by `previewSize` characters (approximately) |
 | `PSKOV_INDEX_URL` | Provides generated page's file name: `<previewsPageBaseName><id>.html` |
 | `PSKOV_PREVIEWS` | Provides a combination of `PSKOV_PREVIEW` sections |
 | `PSKOV_PAGINATION` | Provides pagination section to navigate index (summary) pages |
 | `PSKOV_PAGE_ID` | Provides index (summary) page id starting from `1` |
 | `PSKOV_PAGES_COUNT` | Provides total number of index (summary) pages generated |
 | `PSKOV_PREV_PAGE_URL` | Provides previous index (summary) page file name |
 | `PSKOV_NEXT_PAGE_URL` | Provides next index (summary) page file name |

 Introduced configuration keys include:

 | Key | Description |
 |---|---|
 | `preview` | Points to an HTML template file that is used to generate HTML previews out of the first `previewSize` (approximately) characters of Markdown files |
 | `index` | Points to an HTML template file that is used to generate HTML index (summary) files to host previews |
 | `paginationPrev` | Points to an HTML template file that is used to generate pagination section used by the *last* index (summary) file |
 | `paginationNext` | Points to an HTML template file that is used to generate pagination section used by the *first* index (summary) file |
 | `paginationPrevNext` | Points to an HTML template file that is used to generate pagination section used by index (summary) files *except the ones at the beginning and at the end* |
 | `previewSize` | How many characters (approximately) to take out of a Markdown file to generate an HTML preview |
 | `previewEnding` | String to use at the end of HTML previews |
 | `previewsPerPage` | Number of HTML previews hosted by single index (summary) file |
 | `previewsPageBaseName` | Index (summary) file base name |

 Introduced header constants include:

 | Header constant | Description |
 |---|---|
 | `Date:` | Provides value for `PSKOV_ITEM_DATE` constant when generating HTML out of Markdown |

 This was the final document to make you proficient in generating static sites with **PSKOV**. If you like what we do, support us by joining our group at [Twitter][tw], [Facebook][fb], or [VK][vk].

 Now use **PSKOV** to generate your very own web site!

 </div><div class="contents">

 | < Back | Index | Next > |
 |---|---|---|
 | [04. Language][prev] | [Education][index] | Not available |

 [index]: education.html
 [prev]: education.04.lang.html

 [03-files]: https://github.com/OGStudio/site-pskov-sample/tree/master/03.Blog
 [03-sample]: http://opengamestudio.org/pskov/sample/03.Blog/en/blog/index.html
 [lfsa]: http://opengamestudio.org/lfsa
 [tool]: http://opengamestudio.org/pskov

 [tw]: https://twitter.com/OpenGameStudio
 [fb]: https://www.facebook.com/groups/162611230470183
 [vk]: https://vk.com/opengamestudo
--- a/pskov/en/education.html
+++ b/pskov/en/education.html
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,68 +66,156 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
 Education
        </h1></center>
        <center><div class="contents">
 <p>Here you can find a set of documents to make you proficient in generating static sites with <strong>PSKOV</strong>. You are encouraged to read the documents in order.</p>
 <p>Here is a set of documents to make you proficient in generating static sites with <strong>PSKOV</strong>. We encourage you to read the documents in order.</p>
 <h2 id="01whywhy"><a href="education.01.why.html">01. Why</a></h2>
 <table>
 <thead>
 <tr>
 <th>№</th>
 <th>Document</th>
 <th>Item</th>
 <th>Details</th>
 <th>Demonstration</th>
 <th>Estimated completion time</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>1</td>
 <td><a href="education.01.why.html">Why</a></td>
 <td>Description</td>
 <td>Find out why <strong>PSKOV</strong> was created</td>
 <td>-</td>
 </tr>
 <tr>
 <td>Estimated completion time</td>
 <td>5 minutes</td>
 </tr>
 </tbody>
 </table>
 <h2 id="02dependenciesdeps"><a href="education.02.deps.html">02. Dependencies</a></h2>
 <table>
 <thead>
 <tr>
 <th>Item</th>
 <th>Details</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>2</td>
 <td><a href="education.02.deps.html">Dependencies</a></td>
 <td>Description</td>
 <td>Install dependencies to start using <strong>PSKOV</strong></td>
 <td>-</td>
 <td>?? minutes</td>
 </tr>
 <tr>
 <td>3</td>
 <td><a href="education.03.site.html">Site</a></td>
 <td>Estimated completion time</td>
 <td>5 minutes</td>
 </tr>
 </tbody>
 </table>
 <h2 id="03sitesite"><a href="education.03.site.html">03. Site</a></h2>
 <table>
 <thead>
 <tr>
 <th>Item</th>
 <th>Details</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>Description</td>
 <td>Learn how to create a simple static web site with two pages</td>
 <td>TODO Link</td>
 <td>?? minutes</td>
 </tr>
 <tr>
 <td>4</td>
 <td>Language</td>
 <td>?</td>
 <td>TODO Link</td>
 <td>?</td>
 <td>Estimated completion time</td>
 <td>10 minutes</td>
 </tr>
 <tr>
 <td>Demonstration</td>
 <td><a href="http://opengamestudio.org/pskov/sample/01.TwoPages/about.html">TwoPages</a></td>
 </tr>
 <tr>
 <td>Introduced PSKOV constants</td>
 <td><ol> <li><code>PSKOV_ITEM_TITLE</code></li> <li><code>PSKOV_ITEM_CONTENTS</code></li> </ol></td>
 </tr>
 <tr>
 <td>Introduced configuration keys</td>
 <td><ol> <li><code>input</code></li> <li><code>item</code></li> </ol></td>
 </tr>
 <tr>
 <td>Introduced header constants</td>
 <td><ol> <li><code>Title:</code></li> <li><code>Slug:</code></li> </ol></td>
 </tr>
 </tbody>
 </table>
 <h2 id="04languagelang"><a href="education.04.lang.html">04. Language</a></h2>
 <table>
 <thead>
 <tr>
 <th>Item</th>
 <th>Details</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>Description</td>
 <td>Learn how to add language selection</td>
 </tr>
 <tr>
 <td>Estimated completion time</td>
 <td>10 minutes</td>
 </tr>
 <tr>
 <td>Demonstration</td>
 <td><a href="http://opengamestudio.org/pskov/sample/02.Language/en/about.html">Language</a></td>
 </tr>
 <tr>
 <td>Introduced PSKOV constants</td>
 <td><ol> <li><code>PSKOV_ITEM_URL</code></li> </ol></td>
 </tr>
 </tbody>
 </table>
 <h2 id="05blogblog"><a href="education.05.blog.html">05. Blog</a></h2>
 <table>
 <thead>
 <tr>
 <th>Item</th>
 <th>Details</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>Description</td>
 <td>Learn how to create "dynamic" pages like blog posts</td>
 </tr>
 <tr>
 <td>Estimated completion time</td>
 <td>20 minutes</td>
 </tr>
 <tr>
 <td>Demonstration</td>
 <td><a href="http://opengamestudio.org/pskov/sample/03.Blog/en/blog/index.html">Blog</a></td>
 </tr>
 <tr>
 <td>Introduced PSKOV constants</td>
 <td><ol> <li><code>PSKOV_ITEM_DATE</code></li> <li><code>PSKOV_PREVIEW</code></li> <li><code>PSKOV_INDEX_URL</code></li> <li><code>PSKOV_PREVIEWS</code></li> <li><code>PSKOV_PAGINATION</code></li> <li><code>PSKOV_PAGE_ID</code></li> <li><code>PSKOV_PAGES_COUNT</code></li> <li><code>PSKOV_PREV_PAGE_URL</code></li> <li><code>PSKOV_NEXT_PAGE_URL</code></li> </ol></td>
 </tr>
 <tr>
 <td>Introduced configuration keys</td>
 <td><ol> <li><code>preview</code></li> <li><code>index</code></li> <li><code>paginationPrev</code></li> <li><code>paginationNext</code></li> <li><code>paginationPrevNext</code></li> <li><code>previewSize</code></li> <li><code>previewEnding</code></li> <li><code>previewsPerPage</code></li> <li><code>previewsPageBaseName</code></li> </ol></td>
 </tr>
 <tr>
 <td>5</td>
 <td>Blog</td>
 <td>?</td>
 <td>TODO Link</td>
 <td>?</td>
 <td>Introduced header constants</td>
 <td><ol> <li><code>Date:</code></li> </ol></td>
 </tr>
 </tbody>
 </table>
 <p>If you like what we do, support us by joining our group at <a href="https://twitter.com/OpenGameStudio">Twitter</a>, <a href="https://www.facebook.com/groups/162611230470183">Facebook</a>, or <a href="https://vk.com/opengamestudo">VK</a>.</p>
        </div></center>
        <script type="text/javascript">
        </script>
--- a/pskov/en/education.md
+++ b/pskov/en/education.md
@@ -0,0 +1,68 @@
 Title: Education
 Date: 2019-05-20 00:00
 Category: Page
 Slug: education
 Lang: en

 Here is a set of documents to make you proficient in generating static sites with **PSKOV**. We encourage you to read the documents in order.

 ## [01. Why][why]

 | Item | Details |
 |---|---|
 | Description | Find out why **PSKOV** was created |
 | Estimated completion time | 5 minutes |

 ## [02. Dependencies][deps]

 | Item | Details |
 |---|---|
 | Description | Install dependencies to start using **PSKOV** |
 | Estimated completion time | 5 minutes |

 ## [03. Site][site]

 | Item | Details |
 |---|---|
 | Description | Learn how to create a simple static web site with two pages |
 | Estimated completion time | 10 minutes |
 | Demonstration | [TwoPages][01-sample] |
 | Introduced PSKOV constants | <ol> <li>`PSKOV_ITEM_TITLE`</li> <li>`PSKOV_ITEM_CONTENTS`</li> </ol> |
 | Introduced configuration keys | <ol> <li>`input`</li> <li>`item`</li> </ol> |
 | Introduced header constants | <ol> <li>`Title:`</li> <li>`Slug:`</li> </ol> |

 ## [04. Language][lang]

 | Item | Details |
 |---|---|
 | Description | Learn how to add language selection |
 | Estimated completion time | 10 minutes |
 | Demonstration | [Language][02-sample] |
 | Introduced PSKOV constants | <ol> <li>`PSKOV_ITEM_URL`</li> </ol> |

 ## [05. Blog][blog]

 | Item | Details |
 |---|---|
 | Description | Learn how to create "dynamic" pages like blog posts |
 | Estimated completion time | 20 minutes |
 | Demonstration | [Blog][03-sample] |
 | Introduced PSKOV constants | <ol> <li>`PSKOV_ITEM_DATE`</li> <li>`PSKOV_PREVIEW`</li> <li>`PSKOV_INDEX_URL`</li> <li>`PSKOV_PREVIEWS`</li> <li>`PSKOV_PAGINATION`</li> <li>`PSKOV_PAGE_ID`</li> <li>`PSKOV_PAGES_COUNT`</li> <li>`PSKOV_PREV_PAGE_URL`</li> <li>`PSKOV_NEXT_PAGE_URL`</li> </ol> |
 | Introduced configuration keys | <ol> <li>`preview`</li> <li>`index`</li> <li>`paginationPrev`</li> <li>`paginationNext`</li> <li>`paginationPrevNext`</li> <li>`previewSize`</li> <li>`previewEnding`</li> <li>`previewsPerPage`</li> <li>`previewsPageBaseName`</li> </ol> |
 | Introduced header constants | <ol> <li>`Date:`</li> </ol> |

 If you like what we do, support us by joining our group at [Twitter][tw], [Facebook][fb], or [VK][vk].

 [why]: education.01.why.html
 [deps]: education.02.deps.html
 [site]: education.03.site.html
 [lang]: education.04.lang.html
 [blog]: education.05.blog.html

 [01-sample]: http://opengamestudio.org/pskov/sample/01.TwoPages/about.html
 [02-sample]: http://opengamestudio.org/pskov/sample/02.Language/en/about.html
 [03-sample]: http://opengamestudio.org/pskov/sample/03.Blog/en/blog/index.html

 [tw]: https://twitter.com/OpenGameStudio
 [fb]: https://www.facebook.com/groups/162611230470183
 [vk]: https://vk.com/opengamestudo
--- a/pskov/en/item.template
+++ b/pskov/en/item.template
@@ -20,11 +20,6 @@
            {
                color: #433729;
            }
            iframe
            {
                width: 720px;
                height: 720px;
            }
            html
            {
                font-family: sans-serif;
@@ -71,13 +66,13 @@
            }
        </style>
        <title>
            PSKOV - Opensource Game Studio static site generator
            PSKOV-201905
        </title>
    </head>
    <body>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="index.html">Tool</a>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
--- a/pskov/en/pskov-201905.html
+++ b/pskov/en/pskov-201905.html
@@ -1 +0,0 @@
 ../pskov-201905.html
--- a/pskov/en/tool.pskov.html
+++ b/pskov/en/tool.pskov.html
@@ -3,6 +3,67 @@
    <meta charset="utf-8">
    <head>
        <style>
            #header
            {
                background: #856d51;
                padding: 0.7em;
                text-align: left;
            }
            
            #header a
            {
                color: white;
                text-decoration: none;
                padding: 0.5em 1em 0.5em 1em;
            }
            #title
            {
                color: #433729;
            }
            html
            {
                font-family: sans-serif;
            }
            body
            {
                line-height: 1.5em;
            }
            body
            {
                background: #FAFAFA;
            }
            table
            {
                border-collapse: collapse;
                width: 100%;
            }
            
            table, th, td
            {
                border: 1px solid #aaa;
                padding: 0.5em;
                margin-top: 0.5em;
                margin-bottom: 0.5em;
            }
            code, pre
            {
                font-family: monospace, serif;
                font-size: 1em;
                color: #7f0a0c;
                background: #f5f5f5;
                white-space: pre-wrap;
            }
            .contents
            {
                background: #FFFFFF;
                width: 720px;
                padding: 1em;
                margin-top: 2em;
                margin-bottom: 2em;
                border: 1px solid #E0E0E0;
                text-align: left;
                color: #444;
            }
            table
            {
                border-collapse: collapse;
@@ -28,81 +89,99 @@
                font-weight: bold;
            }
        </style>
        <title>
            PSKOV-201905
        </title>
    </head>
    <body>
        <table>
            <tr>
                <td colspan="2" class="section">
                    <a href="http://opengamestudio.org/lfsa">Local file system access</a>
                </td>
            </tr>
            <tr>
                <td>Path:</td>
                <td id="lfsaPath">Updating...</td>
            </tr>
            <tr>
                <td colspan="2" class="section">
                    Configuration
                    <button type="button" onclick="window.pskovTool.saveCfg()">Save</button>
                </td>
            </tr>
            <tr>
                <td>Input directory:</td>
                <td><input id="input"></input></td>
            </tr>
            <tr>
                <td>Item template:</td>
                <td><input id="item"></input></td>
            </tr>
            <tr>
                <td>Preview template:</td>
                <td><input id="preview"></input></td>
            </tr>
            <tr>
                <td>Index template:</td>
                <td><input id="index"></input></td>
            </tr>
            <tr>
                <td>Pagination 'Previous' template:</td>
                <td><input id="paginationPrev"></input></td>
            </tr>
            <tr>
                <td>Pagination 'Next' template:</td>
                <td><input id="paginationNext"></input></td>
            </tr>
            <tr>
                <td>Pagination 'Previous/Next' template:</td>
                <td><input id="paginationPrevNext"></input></td>
            </tr>
            <tr>
                <td>Preview characters limit:</td>
                <td><input id="previewSize"></input></td>
            </tr>
            <tr>
                <td>Preview ending string:</td>
                <td><input id="previewEnding"></input></td>
            </tr>
            <tr>
                <td>Previews per page:</td>
                <td><input id="previewsPerPage"></input></td>
            </tr>
            <tr>
                <td>Preview page base name:</td>
                <td><input id="previewPageBaseName"></input></td>
            </tr>
            <tr>
                <td colspan="2" class="section">
                    News
                    <button type="button" onclick="window.pskovTool.generateNews()">Generate</button>
                </td>
            </tr>
            <tr>
                <td colspan="2" class="section">Log</td>
            </tr>
            <tr>
                <td id="log" colspan="2"></td>
            </tr>
        </table>
        <div id="header">
            <strong id="title">PSKOV</strong>
            <a href="tool.pskov.html">Tool</a>
            <a href="education.html">Education</a>
        </div>
        <center><h1>
            PSKOV-201905
        </h1></center>
        <center><div class="contents">
            <p>
            <strong>PSKOV</strong> is a static site generator that runs in your web browser.
            What you see now has also been generated with <strong>PSKOV</strong>.
            If you're new to <strong>PSKOV</strong>, visit <a href="education.html">education page</a>.
            </p>
            <table>
                <tr>
                    <td colspan="2" class="section">
                        <a href="http://opengamestudio.org/lfsa">Local file system access</a>
                    </td>
                </tr>
                <tr>
                    <td>Path:</td>
                    <td id="lfsaPath">Updating...</td>
                </tr>
                <tr>
                    <td colspan="2" class="section">
                        Configuration
                        <button type="button" onclick="window.pskovTool.saveCfg()">Save</button>
                    </td>
                </tr>
                <tr>
                    <td>Input directory:</td>
                    <td><input id="input"></input></td>
                </tr>
                <tr>
                    <td>Item template:</td>
                    <td><input id="item"></input></td>
                </tr>
                <tr>
                    <td>Preview template:</td>
                    <td><input id="preview"></input></td>
                </tr>
                <tr>
                    <td>Index template:</td>
                    <td><input id="index"></input></td>
                </tr>
                <tr>
                    <td>Pagination 'Previous' template:</td>
                    <td><input id="paginationPrev"></input></td>
                </tr>
                <tr>
                    <td>Pagination 'Next' template:</td>
                    <td><input id="paginationNext"></input></td>
                </tr>
                <tr>
                    <td>Pagination 'Previous/Next' template:</td>
                    <td><input id="paginationPrevNext"></input></td>
                </tr>
                <tr>
                    <td>Preview characters limit:</td>
                    <td><input id="previewSize"></input></td>
                </tr>
                <tr>
                    <td>Preview ending string:</td>
                    <td><input id="previewEnding"></input></td>
                </tr>
                <tr>
                    <td>Previews per page:</td>
                    <td><input id="previewsPerPage"></input></td>
                </tr>
                <tr>
                    <td>Preview page base name:</td>
                    <td><input id="previewPageBaseName"></input></td>
                </tr>
                <tr>
                    <td colspan="2" class="section">
                        News
                        <button type="button" onclick="window.pskovTool.generateNews()">Generate</button>
                    </td>
                </tr>
                <tr>
                    <td colspan="2" class="section">Log</td>
                </tr>
                <tr>
                    <td id="log" colspan="2"></td>
                </tr>
            </table>
        </div></center>
        <script type="text/javascript">
            <!-- showdown.js -->
            ;/*! showdown v 2.0.0-alpha1 - 24-10-2018 */
@@ -5576,7 +5655,7 @@
            String.prototype.startsWith = String.prototype.startsWith || function(prefix) {
                return this.indexOf(prefix) === 0;
            };

            
            function fileExists(fileName, fileList)
            {
                for (var id in fileList)
@@ -5662,7 +5741,7 @@
                this.subscriptions.push(subscription);
                return subscription;
            }

            
            <!-- LFSA -->
            // LFSA class to communicate with local-file-system-access instance.
            function LFSA()
@@ -5673,28 +5752,21 @@
            LFSA.prototype.get = function(url, successCallback, failureCallback)
            {
                var req = new XMLHttpRequest();
                req.addEventListener(
                    "load",
                    function()
                    {
                        //console.log("get.successCallback.responseText: '" + this.responseText + "'");
                        successCallback(this.responseText);
                    }
                );
                req.addEventListener(
                    "error",
                    function()
                    {
                        failureCallback();
                    }
                );
                req.addEventListener(
                    "abort",
                    function()
                req.onreadystatechange = function()
                {
                    if (this.readyState == 4)
                    {
                        failureCallback();
                        if (this.status == 200)
                        {
                            //console.log("get.successCallback.responseText: '" + this.responseText + "'");
                            successCallback(this.responseText);
                        }
                        else
                        {
                            failureCallback();
                        }
                    }
                );
                }
            
                const prefix = this.host + ":" + this.port;
                const addr = prefix + url;
@@ -5709,28 +5781,21 @@
            LFSA.prototype.post = function(url, data, successCallback, failureCallback)
            {
                var req = new XMLHttpRequest();
                req.addEventListener(
                    "load",
                    function()
                    {
                        //console.log("POST.successCallback.responseText: '" + this.responseText + "'");
                        successCallback(this.responseText);
                    }
                );
                req.addEventListener(
                    "error",
                    function()
                    {
                        failureCallback();
                    }
                );
                req.addEventListener(
                    "abort",
                    function()
                req.onreadystatechange = function()
                {
                    if (this.readyState == 4)
                    {
                        failureCallback();
                        if (this.status == 200)
                        {
                            //console.log("POST.successCallback.responseText: '" + this.responseText + "'");
                            successCallback(this.responseText);
                        }
                        else
                        {
                            failureCallback();
                        }
                    }
                );
                }
            
                const prefix = this.host + ":" + this.port;
                const addr = prefix + url;
@@ -5890,7 +5955,7 @@
                // Start processing.
                process();
            }

            
            <!-- Common -->
            // NewsItem class.
            function NewsItem()
@@ -5908,7 +5973,7 @@
                this.items = [];
                this.previews = [];
            }

            
            <!-- Cfg -->
            // Cfg class.
            function Cfg()
@@ -6051,7 +6116,7 @@
                }
                this.lfsa.saveFile("cfg", cfgFile, success, failure);
            }

            
            <!-- News -->
            // News class.
            function News()
@@ -6091,7 +6156,7 @@
                this.paginatedPreviewPagesChanged = new Reporter();
                this.savedPreviewPages = new Reporter();
                this.finished = new Reporter();

            
                this.inputFilesChanged.subscribe(function(){
                    self.locateMarkdownFiles();
                });
@@ -6671,7 +6736,7 @@
                    }
                );
            }

            
            <!-- Tool -->
            // Tool class.
            function Tool()
@@ -6681,7 +6746,7 @@
                this.cfg = new Cfg();
                this.cfg.lfsa = this.lfsa;
                this.news = new News();

            
                this.news.finished.subscribe(function(){
                    // Continue processing.
                    self.processNewsGeneration();
@@ -6749,10 +6814,11 @@
                    delete this.cfg.cfg["output"];
                }
            }

            
            <!-- Startup -->
            window.pskovTool = new Tool();
            window.pskovTool.run()
        </script>
    </body>
 </html>

--- a/pskov/index.html
+++ b/pskov/index.html
@@ -1,4 +1,4 @@
 <!DOCTYPE html>
 <html>
    <meta http-equiv="refresh" content="0; URL='en/index.html'"/>
    <meta http-equiv="refresh" content="0; URL='en/tool.pskov.html'"/>
 </html>