Lyon Bridge

XML and HTML divergence

Technical Plenary Meeting, 3 November 2010, Lyon France

Tim Berners-Lee <>

Lyon Bridge photo by Christine Vaufrey

W3C logo

TAG will form Task Force

T V Raman (Google) has asked us to form a task force for a well-known issue: the divergence of the HTML and XML stacks.

Goal: Support the community using XML tool chains to generate and possibly re-use web content.

This has a long history - philosophical differences

Divergence dimensions


The intersection of HTML5 and XML languages which can be parsed appropriately as either.

Polyglot Markup: HTML-Compatible XHTML Documents Ed. Eliot Graff, MSFT


Distributed Extensibility

  1. SVG - In-W3C, in HTML WG
  2. RDFa - In W3C, not HTML WG
  3. FBML - Not in W3C.




TAG Issue 67: XML-HTML divergence
TAG Issue 54: Tag Soup Integration
2010-05-03 Raman's mail to the AC
Polyglot Markup: HTML-Compatible XHTML Documents