ISSUE-47

compound keys

RESOLVED: 6.2-Compound Keys

State:

CLOSED

Product:

Raised by:

Peter Patel-Schneider

Opened on:

2007-10-25

Description:

6.2-Compound Keys

Relational Databases often use keys that are composed of multiple fields. OWL allows keys using owl:InverseFunctionalProperty for a single field (property). It would be desirable for OWL to provide the compound keys capability as well.

We agreed to POSTPONE this issue. See resolution below.
Name 	I6.2-CompoundKeys
Raised By 	Jim Hendler
Date 	3 July 2003
Status 	Postponed.
Resolution 	While compound keys would be desirable to add, there is some difficulty in adding them in the current OWL syntax, similar to the problem arising for "qualified" properties (see discussion under issue 3.2). In addition, for the OWL DL profile, it is still something of a research issue as to how these are best realized by DL reasoners. There is also a question as to whether mixing datatype and object type in a compound key would be allowed, and whether it would cause difficulties to reasoners.

Related Actions Items:

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Related emails:

1. Re: Proposal to resolve ISSUE-47: compound keys (from ian.horrocks@comlab.ox.ac.uk on 2008-04-29)
2. Re: Proposal to resolve ISSUE-47: compound keys (from alanruttenberg@gmail.com on 2008-04-29)
3. Re: Proposal to resolve ISSUE-47: compound keys (from jjc@hpl.hp.com on 2008-04-28)
4. Proposal to resolve ISSUE-47: compound keys (from ian.horrocks@comlab.ox.ac.uk on 2008-04-28)
5. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from hendler@cs.rpi.edu on 2007-12-03)
6. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from sattler@cs.man.ac.uk on 2007-12-03)
7. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from bparsia@cs.man.ac.uk on 2007-12-03)
8. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from jjc@hpl.hp.com on 2007-12-03)
9. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from pfps@research.bell-labs.com on 2007-12-03)
10. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from ian.horrocks@comlab.ox.ac.uk on 2007-12-02)
11. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from hendler@cs.rpi.edu on 2007-12-02)
12. Re: ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from ian.horrocks@comlab.ox.ac.uk on 2007-12-01)
13. ISSUE-47 (compound keys): REPORTED: 6.2-Compound Keys (from sysbot+tracker@w3.org on 2007-10-25)

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