To keep the documentation consistent, we set the following rules
which have to be followed when writing the xml documentation files:
All files are to be written in
Indentation of XML tags is 1 more than its parent.
Space characters are used for indentation. Tabs are not allowed, even when
the spaces sum up to the width of one tab.
Lines should be broken at 80 characters maximum.
The shortdesc element of a deprecated item should only
contain one of the available deprecation entities:
Examples of PHP code written for the manual must follow the