rdf:resource" is a shorthand.
...you just write:
In RDF, we're making a big graph. Sometimes, the nodes in the graph represent things that are available on the web. We want to draw a tie that node in the graph to that thing on the web. That's what
rdf:Description rdf:about does- it connects the Description node to the thing on the web.
Here's from my FOAF file:
<foaf:Person> ... <foaf:homepage rdf:resource="http://www.speakeasy.org/~lion/"/> ... </foaf:Person>
This looks like it's the following graph:
(Person) --homepage--> http://www.speakeasy.org/~lion/
In reality, when you undo the RdfResource shorthand, it's drawing the following graph:
(Person) --homepage--> (Description) --about--> http://www.speakeasy.org/~lion/
According to this page,
rdf:resource is a shorthand.
I am a little confused- some times, we seem to use "Descriptions." Other times, we don't seem to.
In my FOAF, it just reads:
<foaf:Person rdf:nodeID="me"> <foaf:name>Lion Kimbro</foaf:name> <foaf:givenname>David</foaf:givenname> <foaf:family_name>Kimbro</foaf:family_name> <foaf:nick>Lion</foaf:nick> <foaf:mbox_sha1sum>03550bd644c1c4bdbd4ef0baf0a4e780bcb4211b</foaf:mbox_sha1sum> ... ... <foaf:homepage rdf:resource="http://www.speakeasy.org/~lion/"/> ... ... <foaf:phone rdf:resource="tel:206.440.0247"/> ... ... </foaf:Person>
My home page gets an rdf:resource, shorthand for a description. But why isn't the other stuff description as well?
I suppose because it doesn't have a URL.
Does everything that has a URL, also have a specification by class "Description"?
Well, here's something- my telephone doesn't have a URL, but it's included. Or maybe it does? It's prefaced with "tel:", so perhaps that's a URL as well.