Am 02.08.2016 um 20:19 schrieb Markus Kroetzsch:
Oh, there is a little misunderstanding here. I
have not suggested to
create a
property "number of sitelinks in this document". What I propose instead
is to
create a property "number of sitelinks for the document associated with
this
entity". The domain of this suggested property is entity. The advantage
of this
proposal over the thing that you understood is that it makes queries much
simpler, since you usually want to sort items by this value, not
documents. One
could also have a property for number of sitelinks per document, but I
don't
think it has such a clear use case.
"number of sitelinks for the document associated with this entity"
strikes me as
semantically odd, which was the point of my earlier mail. I'd much rather
have
"number of sitelinks in this document". You are right that the primary
use would
be to "rank" items, and that it would be more conveniant to have the count
assocdiated directly with the item (the entity), but I fear it will lead
to a
blurring of the line between information about the entity, and
information about
the document. That is already a common point of confusion, and I'd rather
keep
that separation very clear. I also don't think that one level of
indirection
would be orribly complicated.
To me it's just natural to include the sitelink info on the same level as
we
provide a timestmap or revision id: for the document.
I just proposed the simple and straightforward way to solve the practical
problem at hand. It leads to shorter, more readable queries that execute
faster. (I don't claim originality for this; it is the obvious solution to
the problem and most people would arrive at exactly the same conclusion).
Your concern is based on the assumption that there is some kind of
psychological effect that a particular RDF encoding would have on users. I
don't think that there is any such effect. Our users will not confuse the
city of Paris with an RDF document just because of some data in the RDF
store.
Markus
--
Prof. Dr. Markus Kroetzsch
Knowledge-Based Systems Group
Faculty of Computer Science
TU Dresden
+49 351 463 38486
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