Re: Fuseki: how can I inject standard prefixes to every query?

[Michael Wechner]

Thanks for the clarifying example!

Similar to wikidata query https://query.wikidata.org/ where you can 
enter a query without defining prefixes, for example

SELECT ?item ?itemLabel ?dateOfBirth ?workLabel WHERE {
  ?item wdt:P31 wd:Q5.
  ?item ?label "Alfred Hitchcock"@en .
  OPTIONAL{?item wdt:P800 ?work.}
  OPTIONAL{?item wdt:P569 ?dateOfBirth .}
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}

I agreee, for standard prefixes like for example "rdfs" this would be 
very convenient, but I don't know whether this feature does not exist by 
design or because it was not a high priority yet or whether it exists, 
but requires some configuration.

Does anyone else know?

Thanks

Michael

Am 03.09.21 um 08:51 schrieb Laura Morales:
What I mean is really simple. Basically I'd like to send queries like this to 
Fuseki:

     SELECT ?l
     WHERE { ?s rdfs:label ?l }

this is not a valid query because it does not define the rdfs prefix. But I'd 
like to prepend some standard prefixes to every incoming request before they 
are executed. So the request above is transformed into this before being 
executed:

     PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
     SELECT ?l
     WHERE { ?s rdfs:label ?l }

Now I've made an example with rdfs and I hope it's simple enough and that it 
makes sense. In practice, I'd like to have a list of prefixes, even custom 
ones. My endgoal is that I can send queries without having to define any PREFIX 
because they are automatically attached by the server, at every request. If I 
need any particular prefix, or if I need to override one of the default 
prefixes, than those will be specified in the specific query.

Hope it makes sense, thank you.




Sent: Friday, September 03, 2021 at 8:35 AM
From: "Michael Wechner" <michael.wech...@wyona.com>
To: users@jena.apache.org
Subject: Re: Fuseki: how can I inject standard prefixes to every query?

can you give an example?

Thanks

Michael