There are a couple of very good introductions to RDF on the web, but I will outline the most important things to know on this page.
RDF is actually a very simple data model:
A triple always consists of a subject, a predicate and an object - just like a sentence in the natural language. Triples are also called statements.
Here is an example for a triple:
|http://reegle.info/actors/2354||http://xmlns.com/foaf/0.1/name||"Renewable Energy and Energy Efficiency Partnership"|
Here is another example triple, stating that the same actor as above is active in a certain country:
The object is the URI of another resource: Austria. As you can see, it is very simple to express n..m relationships between resources in RDF
The namespaces cause quite a bit of overhead, so often prefixes are used in serialized RDF data:
Here are the two example triples from above - using prefixes in the URIs:
|actors:2354||foaf:name||"Renewable Energy and Energy Efficiency Partnership"|