Re: Support of RDF-star quoted triples in query results

[Andy Seaborne]

The Fuseki the server does handle RDF-star quoted triples.
(otherwise the UI couldn't get an error!)

So this is the Fuseki UI only.

Display of results uses the Yasr component of Yasgui.

https://github.com/TriplyDB/Yasgui

    Andy

There is:
https://github.com/TriplyDB/Yasgui/issues/190

On 05/12/2022 15:15, Daniel Hernandez wrote:

Hi everyone,

I loaded the following data in Fuseki 4.6.1:

@prefix : <http://example.org/> .
<< :Bob :hasFriend :Alice >> :accordingTo :Alice .

Then, the following query returns :Bob and :Alice, as expected.

PREFIX : <http://example.org/>
SELECT ?s ?o
WHERE {
   << ?s ?p ?o >> ?q ?v.
}

However, the following query returns an error "e[t].value.replace is not
a function" in the Fuseki UI when selecting the output type as JSON:

PREFIX : <http://example.org/>
SELECT ?t
WHERE {
   ?t ?q ?v .
}

And the following query returns :Alice (without error):

PREFIX : <http://example.org/>
SELECT ?v
WHERE {
   ?t ?q ?v .
}

However, the problematic query works without the Fuseki UI.

curl -G http://localhost:3030/ds/sparql --data-urlencode \
      query='SELECT ?t WHERE { ?t ?q ?v }'
{ "head": {
     "vars": [ "t" ]
   } ,
   "results": {
     "bindings": [
       {
         "t": {
           "type": "triple" ,
           "value": {
             "subject":  { "type": "uri" , "value": "http://example.org/Bob"; } ,
             "predicate": { "type": "uri" , "value": 
"http://example.org/hasFriend"; } ,
             "object":   { "type": "uri" , "value": "http://example.org/Alice"; }
           }
         }
       }
     ]
   }
}

It seems that this issue only affects the Fuseki UI.

Daniel