this is my users collection. [image] [image] i'm trying to follow tuts from here Home Documentation for Stardog, the world’s leading Knowledge Graph Platform for the Enterprise PREFIX : <http://kim.jong.un/onto#> MAPPING <urn:users> FROM JSON { "us…

You probably need to declare the : prefix in your SPARQL query at the top: prefix : <http://kim.jong.un/onto#>

[image] jess: prefix : http://kim.jong.un/onto# weird i've this in Namespaces [image] after adding this still doesn't return anything. [image]

Can you click "Show Plan" and then "Text" and paste it here? You can use three backticks to quote text blocks.

prefix : <http://kim.jong.un/onto#> Distinct [#1] `─ Projection(?user, ?username) [#1] `─ Empty [#1] [image]

You've registered the virtual graph named "users", right? What happens if you put ?s ?p ?o in the graph <...> { block? Can you show the plan again?

[image] this is my ttl file and its almost empty [image] @prefix : <http://kim.jong.un/onto#> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix xml: <http://www.w3.org/XML/1998/namespace> . @prefix xsd: <http://www.w3.org/2001…

Did you create the virtual graph? Can you show that tab?

Can you try it with reasoning disabled?

oh sorry i thought i put this in first comment [image] and yes i've tried toggle reasoning PREFIX : <http://kim.jong.un/onto#> MAPPING <urn:users> FROM JSON { "users": { "_id": "?id", "username": "?username" } } TO { ?user a :User; :username ?username . } WH…

The virtual graph name showing in the screenshot is dezhi. In your SPARQL query, you should reference the graph virtual://dezhi.

How to make mongodb work with virtual graphs?

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crapthings (crapthings) May 21, 2020, 2:21am 3

weird i've this in Namespaces

after adding this still doesn't return anything.

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How to make mongodb work with virtual graphs?

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