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w3c / activitystreams

Activity Streams 2.0
https://www.w3.org/TR/activitystreams-core/
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sparql service for activitystreams2 ontology #603

Open phtyson opened 3 days ago

phtyson commented 3 days ago

Please Indicate One:

Is there an official SPARQL endpoint that will answer to federated queries about the ActivityStreams2 ontology?

Does W3C host such services, and if so what does it take to set one up?

csarven commented 3 days ago

There is no such SPARQL endpoint to the best of my knowledge.

I don't speak for W3C but I doubt they'll set it up. Hard to say what it would take for W3C to set it up ;)

Not sure why you would need this but perhaps https://sparql.org/sparql.html is of some interest. It is not associated with W3C. It is a free as is service.

Allows SELECT and CONSTRUCT, e.g.:

https://sparql.org/sparql?query=SELECT+*%0D%0AFROM+%3Chttp%3A%2F%2Fwww.w3.org%2Fns%2Factivitystreams-owl%3E%0D%0AWHERE+%7B%0D%0A%3Fs+%3Fp+%3Fo+.%0D%0A%7D&default-graph-uri=&output=xml&stylesheet=%2Fxml-to-html.xsl

SELECT *
FROM <http://www.w3.org/ns/activitystreams-owl>
WHERE {
?s ?p ?o .
}

Allows SERVICE too (IIRC).

phtyson commented 3 days ago

http://www.w3.org/ns/activitystreams-owl would work fine if it returned a correct document (#504 ). I tried it in a SERVICE federated query for the purpose of getting AS2 class and property declarations without having to import them in my local dataset.