[I] 5.3.0 [jena]

["galgonek (via GitHub)" <gi...@apache.org>]

galgonek opened a new issue, #2995:
URL: https://github.com/apache/jena/issues/2995

   ### Version
   
   Generating of syntactically incorrect queries when evaluating a service pattern
   
   ### What happened?
   
   I have noticed that during the evaluation of a federated query, Jena performs substitution of a variable for a RDF term even in cases where the given RDF term cannot be valid.
   
   This can be demonstrated by the following federated query:
   
   ```sparql
   SELECT * WHERE {
     VALUES ?P { "literal" }
   
     SERVICE <https://idsm.elixir-czech.cz/sparql/endpoint/idsm> {
         ?S ?P ?O.
     }
   }
   ```
   
   Jena sends the following query to the endpoint:
   
   ```sparql
   SELECT  *
   WHERE
     { ?S  "literal"  ?O }
   ```
   
   However, such a query is not syntactically correct.
   
   ### Relevant output and stacktrace
   
   ```shell
   
   ```
   
   ### Are you interested in making a pull request?
   
   None


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