- From: Jim O'Donnell <jim@eatyourgreens.org.uk>
- Date: Wed, 11 Mar 2009 22:13:57 +0000
On 11 Mar 2009, at 08:54, Robert J Burns wrote: >> >> >>> Authoring tools can be used to convert from other formats to >>> Gregorian. >> >> And in that regard, it should be very relevant to have a calendar >> attribute. > > Or reuse the RDFa datatype attribute with new calendar system > keywords. > I'm not sure that would work, or rather that you would need the complexity of RDFa for something as simple as a change of calendar. My example of a Julian date in 1732 <time calendar="Julian" datetime="1732-02-22">Feb. 11 1731</time>, (from http://www.tei-c.org/Guidelines/P4/html/ref-DATE.html) would then be, I think, in RDFa <time datatype="GregorianDate" content="1732-02-22">Feb. 11 1731</time> since datatype describes the format of the content attribute, which is always a proleptic Gregorian date. So you'd lose the semantic information that the marked-up date is in the Julian calendar. I'm proposing that datetime accept ISO8601 dates as per the existing W3C datetime profile. ISO8601 dates may only use the Gregorian calendar. In addition, it would be useful, but not essential, in describing the semantics of historical dates to have an attribute, as per TEI, identifying the calendar in use in the text itself. That shouldn't add any extra load to datetime parsers - they only need to be able to understand Gregorian ISO8601 dates. Expanding the datetime or RDFa content attributes to contain non- Gregorian dates would be an unnecessary headache and, frankly, more trouble than it's worth. Regards Jim Jim O'Donnell jim at eatyourgreens.org.uk http://eatyourgreens.org.uk http://flickr.com/photos/eatyourgreens http://twitter.com/pekingspring -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.whatwg.org/pipermail/whatwg-whatwg.org/attachments/20090311/d42672d1/attachment.htm>
Received on Wednesday, 11 March 2009 15:13:57 UTC