oXygen is the best XML editor available, with a large number of users ranging from beginners to XML experts. It is the only XML tool that supports all the XML schema languages. The XSLT and XQuery support is enhanced with powerful debuggers and performance profilers. You can use oXygen XML Editor to work with all XML-based technologies including XML databases, XProc pipelines, and web services.

Specially tuned for content authors, oXygen XML Author comes with a configurable and extensible visual editing mode based on W3C CSS stylesheets with ready-to-use DITA, DocBook, TEI and XHTML support, making oXygen the ideal XML authoring solution.

oXygen XML Editor is a cross-platform application available on all the major operating systems (Windows, Mac OS X, Linux, Solaris) and can be used either standalone or as an Eclipse plugin.

Key features
XML IDE
Different perspectives: XML Editor, XSLT Debugger, XQuery Debugger, XML Databases, XML Tree Viewer/Editor.The views inside the oXygen window are dockable, floating and hideable.
Manage and share transformation scenarios together with the project. Share any of the oXygen XML Editor options together with the project.
Batch validation and batch transformations. Multi-line find and replace support allows regular expressions, is XML aware and can handle multiple files.

Intelligent XML editing
The best content completion support offering XML elements, attributes, values (handling ID references, enumerations and list values). Edit with ease XML documents consisting of repetitive patterns using the spreadsheet-like XML Grid Editor.
Schema annotations/DTD comments presented next to the content completion proposals. oXygen XML Editor provides editing and validation support for NVDL scripts and for XML documents associated with NVDL scripts.
Context sensitive content assistant driven by XML Schema, Relax NG, NVDL, DTD or by the document structure. XML document wizards and XML code templates (abbreviations).
Tree based XML Outliner synchronized in real time with the edited document. New XML document wizards to easily create XML documents specifying a schema or a DTD.
Source folding support with powerful manipulation actions and persistence. Schema Model View presenting schema information about the current XML element.
Format and indent of XML files.

XML Validation
Validate XML documents with XML Schemas, Relax NG, DTD, NVDL and Schematron schema or embedded Schematron rules. Edit and validate support for XML Schema (visual diagram), Relax NG (visual diagram), NVDL scripts, DTD, Schematron.
Multiple validation engines: Xerces, XSV, LIBXML, MSXML 4.0, MSXML.NET, Saxon EE and SQC XML Validation and Well-Formedness Check with XInclude and XML Catalog support.
Easy error tracking - locate the error source by clicking on it, visual markers and overview ruler in the XML editor. Link to the exact location in the specification for XML Schema errors.

XML Schema Modeling
Visual diagram based XML schema editor, RelaxNG Schema Editor. Refactoring actions.
Include/Import graph. Component dependencies analyser.
Generate HTML or PDF documentation from W3C XML Schemas. Support for generating large sets of sample XML instances from W3C XML Schema.

XSL/XSLT Support
XSLT 1.0 and XSLT 2.0 editing, validation, transformation, debugging and profiling support. Multiple XSLT processors: Xalan 2.7.1, Saxon 6.5.5, Saxon EE, XSLTProc and MSXML3.0/4.0/.NET 1.0/2.0.
XSLT debugging using multiple built-in processors: Xalan 2.7.1, Saxon 6.5.5, Saxon Basic and Saxon Schema Aware. Easy XSLT/XQuery transformation and XML validation management with reusable scenarios.
Powerful XSLT search and refactoring actions working across multiple files. Preview the transformation results as XHTML, XML or in your browser.
XSLT Stylesheet documentation in HTML.

XQuery Support
Browse, edit or query using XQuery and SQL native XML or relational databases. Mapping from the XSLT or XQuery output result to the source and stylesheet or XQuery file locations.
XQuery 1.0 editing, validation, transformation debugging and profiling support. Integrated XQuery Debugger for the MarkLogic XML Database.
XQuery Profiler.

XPath Support
XPath 1.0 evaluator and XPath 2.0 evaluator and debugger, XPath content completion support. Content completion with functions and annotations.
XPath Builder View. XPath functions in content completion in Schematron.

Native XML and Relational Databases
Management support for the relational databases: Oracle 11g R1, IBM DB2 Pure XML, Microsoft SQLServer 2008. Management support for the XML Databases: Tamino XML Server, Documentum xDb, MarkLogic, TigerLogic, eXist, Berkeley XML DB.
Import from relational databases and other sources to XML. Browse, edit or query using XQuery and SQL native XML or relational databases.

Single Source XML Publishing
Visual WYSIWYG XML editing mode, based on W3C CSS stylesheets. Ready to use visual editing support for DocBook, DITA, TEI, XHTML.
Visual DITA Maps Manager, closely integrated with DITA Open Toolkit. FO transformations using embedded Apache's FOP to generate PDF or PS files from XML documents.
Support for external Formatting Object Processors. Unicode and Spell-checking with multi-language support: English, German, French, Italian, Japanese and Dutch.
oXygen XML Editor includes the DocBook, DITA and TEI documentation frameworks. Support for CALS and HTML tables.
Preconfigured publishing scenarios for: HTML, WebHelp, PDF, Eclipse/Windows help.

Access to CMSs and Remote Resources
Documentum Content Management System (CMS) Integration Support for editing remote XML files over FTP/SFTP, HTTP/WebDAV and HTTPS/WebDAV.
Any WebDAV enabled CMS

Collaboration
Keep track of the changes you make to a document using the track changes feature. You can examine and merge differences between XML documents using the built-in XML Diff and Merge tool.
Fully-fledged client for the Subversion (SVN) versioning system.

Support for Office Documents
Ready to use validation, editing and processing support for Microsoft® Office 2007 - Office Open XML (OOXML). Ready to use validation, editing and processing support for Open Document Format (ODF) and other ZIP-based packages.

Tools
Conversions from DTD, Relax NG or a set of XML documents to XML Schema, DTD or Relax NG. Canonicalization and digital signature of XML documents.
WSDL SOAP analyzer. Large File Viewer (up to 10 GB).

Contribution to Open Source Projects
oXygen XML Editor makes available an open source NVDL implementation, oNVDL based on Jing.
Availability
Availability
oXygen XML Editor is available as standalone desktop or Java Web Start application, or as an Eclipse plugin. No platform lock-in, the same license can be used on any platform with any distribution of the XML editor.