CR: Time Ontology in OWL

Time Ontology in OWL

https://www.w3.org/TR/2017/CR-owl-time-20170606/

feedback due by: 2017-07-04

Abstract


OWL-Time is an OWL-2 DL ontology of temporal concepts, for describing the temporal properties of resources in the world or described in Web pages. The ontology provides a vocabulary for expressing facts about topological (ordering) relations among instants and intervals, together with information about durations, and about temporal position including date-time information. Time positions and durations may be expressed using either the conventional (Gregorian) calendar and clock, or using another temporal reference system such as Unix-time, geologic time, or different calendars.

The namespace for OWL-Time terms is http://www.w3.org/2006/time#

The suggested prefix for the OWL-Time namespace is time

The OWL-Time ontology is available here.

An ontology of individuals for the Gregorian calendar (months) is available here.

Status of the Document


This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/.

For OGC - This is a Public Draft of a document prepared by the Spatial Data on the Web Working Group (SDWWG) — a joint W3C-OGC project (see charter). The document is prepared following W3C conventions. This document is not an OGC Standard. This document is distributed for review and comment. This document is subject to change without notice and may not be referred to as an OGC Standard. Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

The group expects to request transition to Proposed Recommendation once it has reviewed datasets that have adopted the ontology and completed the implementation report.
 
 Note 

New classes and properties are introduced in this revision of OWL-Time. The new elements primarily relate to relaxing the limitation that time position uses the Gregorian Calendar, and are placed in a logical hierarchy in relation to the original elements. While there is inevitably less implementation evidence for these than the elements that were introduced in the 2006 version, the new elements are essential to satisfying key requirements in the revision. However, a small number of other new elements - :MonthOfYear, :hasTime, :hasXSDDuration, :monthOfYear - have been less strongly motivated and tested, so these are formally features at risk pending the accumulation of evidence of implementation. 

This document was published by the Spatial Data on the Web Working Group as a Candidate Recommendation. This document is intended to become a W3C Recommendation. Comments regarding this document are welcome. Please send them to public-sdw-comments@w3.org (subscribe, archives). W3C publishes a Candidate Recommendation to indicate that the document is believed to be stable and to encourage implementation by the developer community. This Candidate Recommendation is expected to advance to Proposed Recommendation no earlier than 04 July 2017.

Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.

This document is governed by the 1 March 2017 W3C Process Document.