[jira] [Created] (JENA-973) Expression NOT EXISTS and EXISTS define equality by alegbra equivalence, not syntax equivalance.

["Andy Seaborne (JIRA)" <ji...@apache.org>]

Andy Seaborne created JENA-973:
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             Summary: Expression NOT EXISTS and EXISTS define equality by alegbra equivalence, not syntax equivalance.
                 Key: JENA-973
                 URL: https://issues.apache.org/jira/browse/JENA-973
             Project: Apache Jena
          Issue Type: Improvement
          Components: ARQ
    Affects Versions: Jena 2.13.0
            Reporter: Andy Seaborne
            Assignee: Andy Seaborne
            Priority: Minor


{{FILTER NOT EXISTS}} (and {{FILTER EXISTS}}) define their {{.equals}} by the equality of the algebra expression of the pattern part. This works except they are also syntax elements. There can be two different syntax ways to write what becomes the same algebra (but not the other way round).




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