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Standardisation body
This document is the second edition of Modularization of XHTML, an abstract modularization of XHTML and implementations of the abstraction using XML Document Type Definitions (DTDs), and XML Schemas. This modularization provides a means for subsetting and extending XHTML, a feature needed for extending XHTML's reach onto emerging platforms. The second edition of this document provides several minor updates to provide clarifications and address errors found in the first edition.