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Posted to dev@jena.apache.org by "Andy Seaborne (JIRA)" <ji...@apache.org> on 2015/06/26 11:39:04 UTC

[jira] [Created] (JENA-976) Provide machinery for syntax manipulation

Andy Seaborne created JENA-976:
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             Summary: Provide machinery for syntax manipulation
                 Key: JENA-976
                 URL: https://issues.apache.org/jira/browse/JENA-976
             Project: Apache Jena
          Issue Type: Improvement
          Components: ARQ
            Reporter: Andy Seaborne
            Assignee: Andy Seaborne
             Fix For: Jena 3.0.0


Jena ARQ does a lot of algebra manipulation (for example, the high level optimizer is a collection of algebra transformation rules).

Sometimes, manipulation of query syntax is needed. Examples include rewriting a query with a specific variable replaced by a constant term, or simplying syntax after applying {{OpAsQuery}} (for safety, it adds some additonal "{ }" around query parts and these can only be removed in-context; that means a pass over a built query to detect and improve the syntax tree.

This task is to add a framework for query syntax manipulation.




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