- W3C - XML
Own description: "Extensible Markup Language (XML)"
- W3C - XLink - XML Linking Language to describe links between XML resources.
Own description: "XML Linking Language (XLink) Version 1.0"
- W3C - XPath - XML Path Language for addressing parts of an XML document.
Own description: "XML Path Language (XPath)"
- W3C - XPointer - XML Pointer Language. XPointer supports addressing into the internal structures of XML documents.
Own description: "XML Pointer Language (XPointer) Version 1.0"
- Wotsit's Format - File Format Collection.
Own description: "Detailed file formats and data formats for programmers. A large collection of programming resources with detailed information. The place to share useful resources with other programmers."
- XML-RPC - Protocol for distributed computing. Remote procedure calling using HTTP as the transport and XML as the encoding.
- Zvon - Documentation and tutorials on XML and related technologies.
Own description: "ZVON.org"
- XBL - XML Binding Language - Documentation by W3C.
Own description: "XBL 2.0"
