<oXygen/> XML Editor can generate XML Schema Documentation in HTML format, either as a single file, or as a collection of files, grouping components either by namespace or schema location.
The documentation readers are able to keep in view what they consider relevant from the documentation by using the floating control from the right side of the page. All the sections from the HTML page that are describing the schema components can be expanded or collapsed. Note that clicking the symbols representing references makes the browser navigate to the reference target.
You can change the aspect of the HTML pages by modifying the associated CSS file.
Other screenshots:WYSIWYG XML Editor