On Jul 9, 2008, at 8:33 PM, Booth, David (HP Software - Boston) wrote:
From: Bijan Parsia
[ . . . ]
1) sameAs tends to merge annotations and similar meta data, because
it's extensional.
E.g., If I say someTerm dc:creator "Bijan" and someone else
someOtherTerm dc:creator "BoogerHead Jones", and then we say that
someTerm sameAs someOtherTerm, we've (semantically) lost the
distinguish between who created what.
As described, that example looks to me more like an illustration of
the misuse of dc:creator than of owl:sameAs. If :someTerm and
someOtherTerm really denote the same thing, and then according to
my reading of owl:sameAs semantics,
someTerm dc:creator "Bijan" .
means *exactly* the same thing as
someOtherTerm dc:creator "Bijan" .
so I don't see any inappropriate loss of information. Am I missing
something?
I don't know how you determine which is the "real" mistake.
Typically, people mean that to be an annotation (e.g., myClass
dc:creator "Bijan"). You can argue that the annotation system is
broken (I've done that), but that really just pushes things around.
Cheers,
Bijan
