Hi,

A lot of different properties are used in the reference "space" but 'reference URL' and 'stated in' are the two main one. The third important is ' imported from Wikimedia project' whi is the most used but it's not a real reference per se (more a token for tracability).

Then there is a lot of property to precise the reference (like 'page(s)' P304 or 'retrieved' P813 for the mosts common).

Finally, there is probably a lot of errors or mistake.

In a nutshell, you can safely assume that only the property 'stated in' matters.

Cheers,

~nicolas

PS: I tried to do a SPARQL to see which properties is used but it timesOut :/

Le lun. 20 janv. 2020 à 12:26, Gabriel Maia <gabrielmaiarocha@gmail.com> a écrit :

Hello Everyone,

My name is Gabriel, I'm a Ph.D. student who's trying to research the relevance/quality of internal references in Wikidata (non-external URLs).

My first objective is to locate these references, and for that I wanted to ask you all for help.

Here, it is mentioned that sources come normally either if the 'reference URL' property (I assume for external references) or the 'stated in' property (I assume for internal references).

So, my question is, apart from the 'stated in' property, what other properties are used for internal references?

My goal is to parse these references, match them with their claims and see, for each claim-reference pair, how relevant is the reference.

Thank you!

Kind regards,

Gabriel Maia
Data Scientist and Researcher
gabrielmaiarocha@gmail.com | +44 7472 546312

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