Relationship between RDF and XML Schema?

I am working through documentation on alternative schemas for XML. I
note that RDF is a 2 part standard (Model and Syntax a Recommendation
and Scema a Proposed recommendation), also that XML Schema  is a
two-part draft specification.

The XML Schema states that it draws heavily on a number of other
proposals;  Document Content Description (DCD), Document Definition
Markup Language (DDML), Schema for Object-Oriented XML (SOX), XML-Data,
XML-Data Reduced. However, XML Schema Structures also states that it has
not yet documented requirements or dependencies RDF Schema.

Please could someone explain if there is a relationship between the two
and why there are multiple specifications being developed for XML
Schemas. Do they solve different problems, or are they just


Mark Papiani
Research Assistant
Department of Electronics and Computer Science
University of Southampton, UK

Received on Monday, 27 September 1999 18:03:55 UTC