Modularization of XHTML
Murray Altheim, Frank Boumphrey, Writers Guild, Sam Dooley, Ted Wugofski · Data Archiving and Networked Services (DANS) · 2001
This Recommendation specifies an abstract modularization of XHTML and an implementation of the abstraction using XML Document Type Definitions (DTDs). This modularization provides a means for subsetting and extending XHTML, a feature needed for extending XHTML’s reach onto emerging platforms.