Relax NG compact provides syntax highlighting and autocompletion for the compact syntax of the RELAX NG XML schema language. Compact syntax schemas usually use an .rnc file extension. The XML-based syntax in .rng files is handled by Nova's standard XML mode.

Current features:

• Syntax highlighting for .rnc files.
• Autocompletion for keywords, built-in XSD datatypes, and grammar definitions.

At the moment, annotations are not supported.