• Producing a new markup language creates a new XML application.
• Although we can write XML applications, it is useful to establish agreed XML applications.

1. CDF, Channel Definition Format, http://msdn.microsoft.com/workshop/delivery/cdf/reference/CDF.asp.
2. CML, Chemical Markup Language, http://www.xml-cml.org/.
3. ebXML, an XML for electronic business, http://www.ebxml.org/.
4. GeoTech-XML, Geotechnical Engineering, http://www.ejge.com/GML/.
5. MathML, Mathematical Markup Language, http://www.w3.org/Math/.
6. SMIL, Synchronized Multimedia Integration Language, http://www.w3.org/AudioVideo/.
7. SVG, Scaleable Vector Graphics, http://www.w3.org/Graphics/SVG/.
8. TexML, http://www.alphaworks.ibm.com/tech/texml.
9. XGL, http://www.xglspec.org/.
10. XHTML, a rewrite of HTML as strict XML, http://www.w3.org/MarkUp/.

• One list of XML applications is given at http://www.xml.org/xml/registry.jsp.