Code completion(based on dtd or schema introspection) is here but still very experimental.
Here are the remaining problems for the upcoming release :
When content assist is enabled, the typing is very slow.

• Code completion database doesn't process dtd subsets (the parser doesn't ready any sub-dtd)
• Plugin support is a must as lots of features will be added
• Some code must be rewritten to take advantage of the docking framework
• Virtual filesystem support is not complete
• XML Catalog is incomplete too
• XPath support doesn't support namespaces yet
• My other project jxsltdoc is in progress, it will be added as well as a schema documentation tool(xssdoc and dtddoc)