On 02.08.2016 20:59, Daniel Kinzler wrote:
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