- From: Danny Ayers <danny.ayers@gmail.com>
- Date: Mon, 20 Jun 2005 18:09:14 +0200
- To: Petko Petkov <p.d.petkov@gmail.com>
- Cc: semantic-web@w3.org
What Tom said and...
given the three samples that have come up, turning them into statements:
1)
<rdf:Description rdf:about="http://url.com">
<news:title>Some title Here</news:title>
<news:description>This is fun</news:description>
</rdf:Description>
http://url.com http://purl.org/rss/1.0/title "Some title Here"
http://url.com http://purl.org/rss/1.0/description "This is fun"
The title and description are both about the resource identified by
http://url.com
2)
<item rdf:about="http://url.com">
<title>Some title Here</title>
<description>This is fun</description>
</item>
http://url.com http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://purl.org/rss/1.0/item
http://url.com http://purl.org/rss/1.0/title "Some title Here"
http://url.com http://purl.org/rss/1.0/description "This is fun"
The title and description are both about the resource identified by
http://url.com, which is an instance of the *class* 'item'.
3)
<rdf:Description rdf:about="http://url.com">
<news:item rdf:parseType="Resource">
<news:title>Some title Here</news:title>
<news:description>This is fun</news:description>
</news:item>
</rdf:Description>
genid:ARP913880 http://purl.org/rss/1.0/title "Some title Here"
genid:ARP913880 http://purl.org/rss/1.0/description "This is fun"
http://url.com http://purl.org/rss/1.0/item genid:ARP913880
The title and description are both about something not identified (a
bnode with the local label genid:ARP913880). The resource identified
by http://url.com, has a *property* 'item', the object of which is the
bnode.
So your queries might be:
1) what is the title of the resource http://url.com?
2) what is the title of the item http://url.com?
3) what is the title of the item of http://url.com?
(any could potentially return multiple results)
btw, I got the above statements using the RDF validator:
http://www.w3.org/RDF/Validator/
The graph view is very useful when trying to figure out modelling.
Cheers,
Danny.
--
http://dannyayers.com
Received on Monday, 20 June 2005 16:09:23 UTC