Time Ontology in OWL

Moving Time Ontology in OWL to W3C Recommendation status has been identified as an activity to be undertaken by the Spatial Data on the Web Working Group [1].

In response to this proposal, I have developed some small extensions to OWL-Time to accommodate the encoding of temporal position using reference systems other than the Gregorian Calendar/24-hour clock (which is the only system built in to OWL-Time).
The extension is consistent with the goal of alignment with known geospatial requirements, since it accommodates the set of 'temporal reference systems' described in ISO 19108, which is the relevant standard from the ISO Geographic Information committee TC 211 [2]
I've written this up and submitted to Semantic Web Journal where it is currently in review.
SWJ has an open review system, so the submission can be viewed there already [3].

Two versions of the ontology are proposed: the first merely extends OWL-Time in a new namespace, the second proposes a replacement that generalizes OWL-Time.
Using either, existing users should notice no difference, as the cases supported by OWL-Time are encoded exactly the same.
But users who require a slightly generalized capability would be accommodated, reducing the need to look elsewhere.
The proposed ontologies are available online [4,5].

I hope this contribution can be considered as input to the Time Ontology activity.

[1] http://www.w3.org/2014/05/geo-charter
[2] http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=26013
[3] http://semantic-web-journal.net/content/time-ontology-extended-non-gregorian-calendar-applications
[4] http://def.seegrid.csiro.au/ontology/time/plus
[5] http://def.seegrid.csiro.au/ontology/time/new

Simon J D Cox
Research Scientist
Land and Water
CSIRO

E simon.cox@csiro.au T +61 3 9252 6342 M +61 403 302 672
37 Graham Road, Highett, Vic
PO Box 56, Highett, Vic 3190
www.csiro.au<http://www.csiro.au/> | www.csiro.au/SimonCox<http://www.csiro.au/SimonCox>

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