[Nepomuk] Special Identifying Properties

[Vishesh Handa]

Hey Everyone

Martin and I were discussing storeResources yesterday, and we stumbled on
the need to have certain properties act as Primary Keys for Resources.
Currently, storeResources treats the nie:url as a Primary Key, only if the
nie:url is not present does it use the literal identification scheme ( read
datamanagement.h for more info )

With Martin working on pimo:Person and nco:PersonContact aggregation, he
requires the nco:hasEmailAddress to act as a Primary Key. Additionally I
would like nfo:hashValue to act as one. So now that we have 3 contenders, it
makes sense to mark these properties in the ontologies as globally
identifying or something.

What do you guys think? If you approve, can you suggest a way to mark these
properties?

One option is that we have a nxx:globalIdentifyingProperty, and make
nie:url, nco:hasEmailAddress, and nfo:hashValue subclasses of it.

-- 
Vishesh Handa
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