XML
XML Extensible Markup Language):
- A lightweight SGML designed for network use
- Addresses HTML's lack of evolvability
- Arbitrary elements can be defined (<STUDENT-NUMBER>, <PART-NO>, etc)
- Agreement achieved quickly - XML 1.0 became W3C Recommendation in Feb 1998
- Support from industry (SGML vendors, Microsoft, etc.)
- HTML is being described in HTML - see <URL: http://www.w3.org/TR/WD-html-in-xml/>