RDF identifies resources with Uniform Resource Identifiers (URI) as described in [], but with a slight difference: RDF uses what we will call qualified URIs, that is, URIs with an optional fragment identifier (a text added to the URI with a "#" between them). For [], the fragment identifier returns ``a property of the data resulting from a retrieval action''; however, RDF considers every qualified URI (with or without fragment identifier) as a full resource by itself1. In the rest of this tutorial, we will therefore use the word ``resource'' in the RDF point of view, unless specified otherwise.