ISSUE-169: Section 7, DateTime Description

Section 7, DateTime Description

Time ontology in OWL
Raised by:
Simon Cox
Opened on:

Limits on the values of the DateTimeDescription properties should be specified (e.g. seconds between 0 inclusive and 60 [or 61] exclusive).

XML Schema defines “2007-03-21T24:00:00-04:00” and “20070-03-22T00:00:00-04:00” as two representations of the same time. Is “24:00” hours allowed in a DateTimeDescription? What does it mean?
Related Actions Items:
No related actions
Related emails:
  1. RE: OWL-Time - ISSUE-169: Section 7, DateTime Description (from on 2017-04-13)
  2. OWL-Time - ISSUE-169: Section 7, DateTime Description (from on 2017-04-12)

Related notes:

Proposed disposition from email 2017-04-12

The valid values for the fields – including bounds - in a compact DateTime, and also gDay, gMonth and gYear are specified through a lexical pattern in the XML Schema specification – see

xsd:dateTime and xsd:dateTimeStamp are built in to OWL2, and most OWL processors enforce this directly.

No need to say anything in the OWL-Time document (though added hyperlinks to the relevant position in the XSD Datatypes spec).

Simon Cox, 21 Apr 2017, 02:29:10

Display change log ATOM feed

Chair, Staff Contact
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <>.
$Id: 169.html,v 1.1 2018/10/09 10:07:57 carine Exp $