| name | mediatype | type | date released | Extension | Latest version | Magic number | Open format | Standard | Website | file |
|---|---|---|---|---|---|---|---|---|---|---|
| XHTML | App/XML | System | 26/01/2000 | .xhtml, .xht,$#$.xml, .html, .htm | 5.0 | Yes | 1.0, 1.1 | Website | ||
| SBML | App/XML | System | 02/03/2001 | .xml, .sbml | Yes | Website | ||||
| XDXF | App/XML | Web | 10/09/2006 | .xdxf | 31 | Yes | Website | |||
| Simple Knowledge Organization System | App/XML | Executable | 28/10/2013 | .rdf | Recommendation 18 August 2009 | Website | ||||
| SOAP | App/XML | 28/10/2013 | .ssdl | SOAP Service Description Language (SSDL) v1.3 | Website |