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Try It Out Yet Another Syntax 1. Open your Web browser at the W3C RDF Validator: http://www.w3.org/RDF/Validator. 2. Type the following into the edit box: 3. Under Display Result Options, select Triples and Graph. 4. Click the Parse RDF button. The results page should look similar to Figure 20-11. Figure 20-11 How It Works As you may have guessed, the XML listing is simply one more possible way of expressing those two statements in RDF/XML. If you take the earlier examples and surround them with the tags and namespace declarations you will find that they all mean the same thing. Once more this chapter has drifted a little away from modeling as such, but there s a good reason for that. Because RSS 1.0 is defined as RDF/XML, it inherits the modeling language of RDF. That is to say, RSS 1.0 has a well-defined data model in RDF through which the entities and relationships found in a feed are expressed. Apart of this model is inherent in the RDF/XML syntax, it unambiguously states some of the basic information: what is an entity, what is its type, what are the relationships. The type (class) and relationship names are all given as URIs using XML namespaces, so for example the