Oxygen is an XML Editor, XSLT/XQuery Debugger and Profiler with full Unicode support. It supports visual XML editing driven by CSS stylesheets. Introduces XML Author specially tuned for content authors providing a well designed interface for XML editing by keeping only the relevant authoring features. It offers a powerful code insight that can follow a DTD, Relax NG or an XML Schema or even can learn the structure from a partial edited document. XML and XSL documents can be easily associated one with the other and the transformation results can be viewed as text or HTML. Oxygen provides a visual schema editor for W3C XML Schema and Relax NG schema designed to simplify the development and understanding of the schema files. Oxygen validates XML, XSL, XQUERY, FO, XSD, RNG, RNC, NRL, DTD, Schematron, WSDL and CSS content, reporting errors with description and line number information and marking them in the document when validate as you type is enabled.