ISSUE-20: Allow a predicate/object map to reference a joined table.

predicate/object refer to joined table

Allow a predicate/object map to reference a joined table.

State:

POSTPONED

Product:

R2RML

Raised by:

David McNeil

Opened on:

2011-02-01

Description:

Allow a predicate/object map to reference a joined table.

RefPredicateObjectMaps allow the logical tables under TriplesMaps to be "joined". But they do not allow the expressions used to compute the predicate or
object to refer to the parent's logical table.

This can be worked around by creating a new SQL query that performs the necessary join and using this to produce the subject, predicate, and object. However, this requires undesirable copying of the SQL.

This could be addressed by allowing a predicate object map to explicitly
specify a logical table to join to the TriplesMaps logical table.

Related Actions Items:

No related actions

Related emails:

1. Minutes of 2011-07-12 telecon (from michael.hausenblas@deri.org on 2011-07-12)
2. Re: Agenda for July 12 Telcon (from michael.hausenblas@deri.org on 2011-07-12)
3. Re: Agenda for July 12 Telcon (from juanfederico@gmail.com on 2011-07-12)
4. Re: Agenda for July 12 Telcon (from privera.salas@gmail.com on 2011-07-12)
5. Re: Agenda for July 12 Telcon (from marcelo.arenas1@gmail.com on 2011-07-12)
6. Agenda for July 12 Telcon (from ashok.malhotra@oracle.com on 2011-07-09)
7. Re: Agenda for June 28 Telcon (Today) (from richard@cyganiak.de on 2011-06-28)
8. Re: Housekeeping on open/raised issues, with PROPOSAL (from dmcneil@revelytix.com on 2011-06-21)
9. Housekeeping on open/raised issues, with PROPOSAL (from richard@cyganiak.de on 2011-06-21)
10. Re: Reviewing some issues (from dmcneil@revelytix.com on 2011-05-31)
11. Reviewing some issues (from richard@cyganiak.de on 2011-05-30)
12. Re: RDB2RDF WG agenda for 2011-03-29 meeting 1600 UTC (from privera.salas@gmail.com on 2011-03-29)
13. Re: RDB2RDF WG agenda for 2011-03-29 meeting 1600 UTC (from nuno.lopes@deri.org on 2011-03-29)
14. Re: RDB2RDF WG agenda for 2011-03-29 meeting 1600 UTC (from richard@cyganiak.de on 2011-03-25)
15. Re: RDB2RDF WG agenda for 2011-03-29 meeting 1600 UTC (from ivan@w3.org on 2011-03-25)
16. RDB2RDF WG agenda for 2011-03-29 meeting 1600 UTC (from michael.hausenblas@deri.org on 2011-03-25)
17. Re: SQL in R2RML mappings (from dmcneil@revelytix.com on 2011-02-01)
18. ISSUE-20 (predicate/object refer to joined table): Allow a predicate/object map to reference a joined table. [R2RML] (from sysbot+tracker@w3.org on 2011-02-01)

Related notes:

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