Re: Is it a semantic problem?

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