Re: plural vs singular properties (a proposal)

Garret Wilson wrote:
> How does RDF justify repeated properties?

Sorry, maybe I would have been clearer if I would have said, 
"multivalued properties", in which a property appears multiple times for 
the same resource but with different values, e.g.

<rdf:Description>
  <dc:subject>semantic web</dc:subject>
  <dc:subject>database</dc:subject>
</rdf:Description>

This is an area of conflict with the relational model, and I'm wondering 
how RDF justifies this.

Thanks,

Garret