RE: Time Ontology outstanding Issue 1

It is a potential resolution of Issue 2.
Issue 2 – people would like some standard predicates to link from anything to temporal objects
Issue 1 – specifying domains on the predicates in the OWL-Time ontology prevents their use more generally.

It really is an open issue. Probably the hardest one left in the OWL-Time revision.

Simon

From: Little, Chris [mailto:chris.little@metoffice.gov.uk]
Sent: Friday, 16 December, 2016 21:23
To: SDW WG Public List <public-sdw-wg@w3.org>; sdwwg@lists.opengeospatial.org
Subject: Time Ontology outstanding Issue 1

Dear All,

Here is an issue in the latest draft of the Time Ontology http://w3c.github.io/sdw/time/ for discussion and resolution.
----------------
Section 2 Changes from previous versions
Issue 1 https://www.w3.org/2015/spatial/track/issues/64

Most of the properties defined in the original ontology have global constraints on the domain and range. If the rdfs:domain were left unspecified, the properties could be used more widely without undesirable entailments. Their use in the context of the classes in the ontology is adequately controlled through guarded restrictions (local cardinality constraints)
----------------

I have probably misunderstood, but is this something that has already been done to the revised ontology at https://raw.githubusercontent.com/w3c/sdw/gh-pages/time/rdf/time.ttl or something that is proposed?

If not yet done, is it a proposal to remove the definition:

rdfs:domain [

      rdf:type owl:Class ;

      owl:unionOf (

          :GeneralDateTimeDescription

          :Duration

        ) ;

    ] ;


?

Or is this a proposal to remove all definitions of rdfs:domain in the ontology? That is, all the statements like:
rdfs:domain :TemporalEntity ;

rdfs:domain :GeneralDateTimeDescription ;

rdfs:domain :DateTimeInterval ;

rdfs:domain :Instant ;

rdfs:domain :ProperInterval ;

rdfs:domain :GeneralDurationDescription ;

rdfs:domain :TimePosition ;

rdfs:domain :Duration ;



Chris

Chris Little
Co-Chair, OGC Meteorology & Oceanography Domain Working Group

IT Fellow - Operational Infrastructures
Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB  United Kingdom
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E-mail: chris.little@metoffice.gov.uk<mailto:chris.little@metoffice.gov.uk>  http://www.metoffice.gov.uk


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