FW: Use of OWL-Time classes in EO-QB

From: Cox, Simon (L&W, Clayton)
Sent: Monday, 8 January, 2018 16:52
To: 'public-sdwig@w3.org' <public-sdwig@w3.org>
Subject: Use of OWL-Time classes in EO-QB

Dear SDWIG -

The EO-QB note includes some illustrations of the use of classes from OWL-Time [1].
These illustrate use of some shortcuts introduced in the 2006 Note version of OWL-Time [2] which were reconsidered in the 2017 Recommendation [3].
In view of these, I would suggest that EXAMPLE 14 be revised as follows:

EXAMPLE 14
:coverageTemporalDomain a qb:AttributeProperty, qb4st:TemporalProperty ;
#    rdfs:range time:DateTimeInterval ; # better to use the more general class for the range of a temporal domain
    rdfs:range time: Interval ;
    qb:concept sdmx-concept:timePeriod .

:time a qb:DimensionProperty, qb4st:TemporalProperty ;
#    rdfs:range xsd:dateTime ;                # use of xsd:dateTime for periods or intervals is deprecated for reasons given here https://www.w3.org/TR/owl-time/#time:xsdDateTime
    rdfs:range time:Interval ;
    qb:concept sdmx-concept:timePeriod .

:exampleDataset a qb:DataSet, prov:Entity ;
    qb:structure :exampleStructure ;
    :coverageSpatialDomain "POLYGON((90 41.87, 93.33 41.87, 93.33 38.18, 90 38.18, 90 41.87))"^^ogc:wktLiteral ;
    :coverageTemporalDomain :timeDomain .

:timeDomain a time:Interval ;
    time:hasBeginning :timeBeginning ;
    time:hasEnd :timeEnd .

:timeBeginning a time:Instant ;
    time:inXSDDateTime "2001-10-26T21:32:52"^^xsd:dateTime .

:timeEnd a time:Instant ;
    time:inXSDDateTime "2001-10-26T21:32:52"^^xsd:dateTime .

:R000 a :GridSquare ;
    qb:dataSet :exampleDataset ;
#    :time "2001-10-26T21:32:52"^^xsd:dateTime . # replace with explicit time:Interval formaulation
    :time [ a time:Interval ;
        time:hasBeginning         [ time:inXSDDateTimeStamp "2001-10-26T21:32:52Z"^^xsd:dateTimeStamp ; ] ;
        time:hasEnd                    [ time:inXSDDateTimeStamp "2001-10-26T21:32:53Z"^^xsd:dateTimeStamp ; ] ;
    ] .


[1] https://www.w3.org/TR/eo-qb/#OWL-Time
[2] https://www.w3.org/TR/2006/WD-owl-time-20060927/
[3] https://www.w3.org/TR/owl-time

Simon J D Cox
Research Scientist
Environmental Informatics
CSIRO Land and Water<http://www.csiro.au/Research/LWF>

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