[GitHub] [jena] afs commented on issue #1526: rsparql and custom collection functions

[GitBox <gi...@apache.org>]

afs commented on issue #1526:
URL: https://github.com/apache/jena/issues/1526#issuecomment-1242666783

   Is the error before the request is sent?
   
   That would be because `rsparql` doesn't know that it is an aggregate function. Aggregators have to be declared to be parsed correctly otherwise they look like plain function calls.
   
   You could add custom Jena initialization code to the classpath to declare the aggregates.
   
   Or when the far end is ARQ, you can use the AGG syntax to indicate an aggregate.
   
   ```
   select ?s1 (AGG set:collect(?loc2) as ?loc2s) {
   ```
   
   except `rsparql` accepts strict SPARQL 1.1 so it needs a tweak for that.
   


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