Add placeholders chapter

Signed-off-by: trivernis <trivernis@protonmail.com>

chapters/configuration.md

@@ -37,11 +37,14 @@ It currently supports two keys:
 
 ```toml
 [metadata]
-# language setting of the document
+# Language setting of the document
 language = 'en'
 
-# author of the document
+# Author of the document
 author = 'author'
+
+# Title of the document
+title = 'title'
 ```
 
 

chapters/glossary.md

@@ -49,3 +49,8 @@ You can force Snekdown to use the long form for an entry by writing
 
 ~~SHORT
 ~~HTML
+
+
+The list of glossary entries can be inserted with the `[[GLS]]` placeholder.
+
+[[GLS]]

chapters/placeholders.md

@@ -0,0 +1,30 @@
+# Placeholders
+
+Placeholders are used to insert additional content or variables in the document.
+The syntax for placeholders is:
+
+```
+[[PLACEHOLDER]]
+
+# Example
+[[date]]
+```
+
+The most commonly used placeholders are:
+
+
+| Placeholder                   | Meaning                                               |
+| ----------------------------- | ----------------------------------------------------- |
+| `[[TOC]][ordered=true/false]` | Inserts the table of contents at the current position |
+| `[[BIB]]`                     | Inserts the bibliography list at the current position |
+| `[[GLS]]`                     | Inserts the glossary list at the current position     |
+| `[[date]]`                    | Inserts the current date                              |
+| `[[time]]`                    | Inserts the current time                              |
+| `[[datetime]]`                | Inserts the current date and time                     |
+| `[[author]]`                  | Inserts the author of the document                    |
+| `[[title]]`                   | Inserts the title of the document                     |
+ 
+
+Additionally all entries defined in the `custom_attributes` section of the configuration
+can be inserted as placeholders.
+

main.md

@@ -7,7 +7,7 @@
 - - -
 ##[toc-hidden] Table of Contents
 
-[[TOC]]
+[[TOC]][ordered]
 
 - - -
 
@@ -54,3 +54,6 @@
 <[chapters/configuration.md]
 
 - - -
+
+<[chapters/placeholders.md]
+