[Wikidata-bugs] [Maniphest] [Created] T196798: SPARQL federated query SERVICE endpoint syntax (variable instead of uri)

[Esc3300]

Esc3300 created this task. Esc3300 added a project: Wikidata-Query-Service. Herald added a subscriber: Aklapper. Herald added projects: Wikidata, Discovery.

TASK DESCRIPTION

Current samples for federated queries in SPARQL with blazegraph suggest the following format:

SERVICE <http://data.cervantesvirtual.com/openrdf-sesame/repositories/data>  { .. }

or

SERVICE SILENT <http://data.cervantesvirtual.com/openrdf-sesame/repositories/data>  { .. }

Following the discussion here, it seems that the following should be valid as well:

BIND(uri("http://data.cervantesvirtual.com/openrdf-sesame/repositories/data") as ?endpoint)
SERVICE ?endpoint  { .. }

or

?item wdt:P123456 ?endpoint .
SERVICE ?endpoint  { .. }

Obviously, provided that the endpoint is accessible from query.wikidata.org.

TASK DETAIL

https://phabricator.wikimedia.org/T196798

EMAIL PREFERENCES

https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Esc3300
Cc: Smalyshev, Aklapper, Esc3300, Lahi, Gq86, Darkminds3113, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, Avner, Gehel, Jonas, FloNight, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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