Source code is available.
If you are interested in annotations, visit the Annotea home page. Read about the W3C HTML Activity on the HTML home page. Attendees have the opportunity to meet members of the W3C Team and the staff of the W3C Office in Germany. Find W3C in Hall 16, Stand D59. The formalization is a declarative system for describing and naming XML Schema information, specifying XML instance type information, and validating instances against schemas.