version: $Revision: 1.1 $ date: $Date: 2005/09/09 19:51:00 $ author: Jos de Bruijn this schema is a module, which belongs to the WRL/XML schema specification. This schema provides the necessary definitions for the identifiers in WRL/XML. The basic kind of identifier in WRL: an IRI. As an URI is more restrictive then an IRI, we are forced to use xs:string instead of xs:anyURI as type! Note that when translating the standard WRL syntax to XML, Qualified names are resolved to full IRIs. When using the reserved IRI http://www.wsmo.org/wsml/wrl-syntax#anonymousID, it is interpreted as an anonymous ID. A data value in WRL. The type is required. Because we allow complex constructed data values, a data value can have multiple arguments. The arguments are strictly ordered. The content is mixed; it is thus possible to use both regular text and tags which represent the arguments. Regular text is interpreted as the first argument. wrlID corresponds with either an IRI, a string, an integer, a decimal, a variable or an anonymous identifier. The type of the identifier is indicated in the attribute 'type'. The IRIs identifying the types IRI, string, integer and decimal correspond with the IRIs of the datatypes as defined in Appendix C of the WRL specification. The type variable is identified with the IRI http://www.wsmo.org/wsml/wrl-syntax#variable, the type anonymousID is identified with http://www.wsmo.org/wsml/wrl-syntax#anonymousID. A variables in a WRL logical expression.