A CSS-styled editor for document-type XML such as DocBook and xhtml. Vex provides a wordprocessor-like interface for editing structured documents in XML. It is written in Java and based on the Eclipse platform. Some of Vex's notable features are as follows.

* Uses regular CSS for styling documents.

* Constrains the document to valid XML while you type.

* Produces readable, word-wrapped XML documents.

* Leverages the power of the Eclipse platform, e.g. supports full integration with CVS.