Creating RDF Schemas

So far, the property elements that you use in RDF are up to you to define, unless you use someone else's RDF content model, such as the Dublin Core. Until recently, there was no real way to make sure that RDF software would be able to check the syntax of your RDF extensions.

However, the W3C has been working hard on creating an RDF schema language, and you can find the details at www.w3.org/TR/rdf-schema. It's not finalized yet (the specification is a working draft at this writing), and it is not supported by software. When it's available, though, it will let RDF parsers check the full syntax of the extensions you make to RDF.

And that's it for our coverage of SOAP and RDF in this chapter. In the next chapter, we'll take a look at Vector Markup Language (VML).