On May 16, 2007, at 3:53 PM, Pat Hayes wrote:
Named graphs ARE supported by most triplestores, but they are
mostly already reserved for other uses, like the representation of
provenance based on the RDF files that the triples were loaded
from.
Reserved? In what sense? a single URi can have multiple properties
and hence multiple uses.
I think he means reserved in the sense of the question I asked you
about nested graphs - if graphs can't nest then it seems difficult,
on the face of it, to have a graph that groups a set of statements
that, say, comes from one data provider(the provenance information),
and within it graphs that mark groups of statements in order to talk
about evidence for them.
Ah, I see. Yes, there are all kinds of ways that structures of sub-
and super- graphs could be defined which are not currently supported
by any standards in the RDF family.
-Alan
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