Table of Contents
Edit modes are defined using XML, the eXtensible Markup
    Language; mode files have the extension
    .xml. XML is a very simple language, and as a result
    edit modes are easy to create and modify. This section will start with a
    short XML primer, followed by detailed information about each supported tag
    and highlighting rule.
Editing a mode or a mode catalog file within jEdit will cause the changes to take effect immediately. If you edit modes using another application, the changes will take effect after the > > command is invoked.