WikiEngine is the thing that's making this thing work. It's responsible for converting the Wiki markup into glorious HTML for you to view.

WikiEngine also handles things like storing pages, etc.

The JSPWiki WikiEngine consists of a few hundred lines of Java code, offering services to the custom JSP pages. The actual HTML translation is done by a custom java.io.Reader, called TranslatorReader, and the page storage is done via pluggable WikiPageProvider classes.