The property should not be used as mainsnak at all. These rules resolve some issues of this type automatically:
- Maybe it would be better if protocol-relative URLs were allowed. I don't know whether there has already been discussion about that... SPQRobin (talk) 12:20, 4 October 2013 (UTC)
When the web page being used for referencing claims is the same as the 'official website' of the object, which property should be used for those claim references: this one or official website (P856)? See for example Nativity of St. John the Baptist (Q18602467). Bever (talk) 12:31, 12 June 2015 (UTC)
- Still this one, I think. official website (P856) has a very different meaning, which doesn’t apply to references. —DSGalaktos (talk) 17:22, 12 June 2015 (UTC)
The property must accept an ending slash, like Property:P856 (official website).
One of the purposes of reference URL (P854) it that it should make it easy to identify which statements on which items are referenced to a particular website.
However, this has now become beyond the capability of the WDQS SPARQL service -- general queries to search the whole set of reference URLs all time out.
It's possible that the WDQS developers may be able to find some tweak to fix this. Otherwise, to make such reference searches possible, for the present it may be necessessary to limit the domain of items to be searched over in some way. Jheald (talk) 11:36, 11 February 2017 (UTC)
Jeg har nu ændret mærkatet på dette emne til "reference-URL" istedet for blot "URL" og også ændret navnet på den mere generelle egenskab URL (P2699) (før "ressource-URL"). Jeg håber det bringer mere klarhed? — Finn Årup Nielsen (fnielsen) (talk) 14:13, 10 March 2017 (UTC)