express formally semantic, only structure and data-types. Despite being the ideal, the inclusion of RDF assumptions is very poor and is not a recommendation in the schema development frameworks. See also Data structure List of XML schemas Schema (disambiguation) (for other uses of the term) Structuring information XML Information Set XML log Languages: CLiX Document Structure Description Document Type Definition Namespace Routing Language Namespace-based Validation Dispatching Language OASIS CAM RELAX NG Schematron W3C XML Schema References Comparative Analysis of Six XML Schema Languages by Dongwon Lee, Wesley W. Chu, In ACM SIGMOD Record, Vol. 29, No. 3, page 76-87, September 2000 Taxonomy of XML Schema Languages using Formal Language Theory by Makoto Murata, Dongwon Lee, Murali Mani, Kohsuke Kawaguchi, In ACM Trans. on Internet Technology (TOIT), Vol. 5, No. 4, page 1-45, November 2005 External links Comparing XML Schema Languages by Eric van der Vlist (2001) Application of XML Schema in Web Services Security by Sridhar Guthula, W3C Schema Experience Report, May 2005 March 2009 DEVX article "Taking XML Validation to the Next Level: Introducing CAM" by Michael Sorens Data modeling languages ISO standards World Wide Web Consortium standards XML XML-based standards