On 5 Mar 2009, at 15:17, Greg Houston wrote:
Personally, I think it would be an improvement to the datetime
attribute if it was valid for at least -9999 - 9999:
<p> ... For these events to take place within a three week or so
period is simply impossible. The <time
datetime="-0004-03-13">eclipse</time> cannot be the one written in the
records of Josephus.</p>
I agree that this would be an improvement, since it would make <time>
compatible with hCalendar by using ISO8601 for datetime.
By remarkable serendipity, Paul Tarjan posted a presentation about
searchmonkey today
http://www.slideshare.net/ptarjan/semantic-searchmonkey
It mentions searching the web by date, where that information is
available. So I would say a key use case for marking up historic
dates is searching large archives by date eg. searching the National
Maritime Museum archive for Elizabethan Navy records dating from 1595.
Wikipedia uses the date-time design pattern, from microformats, to
mark up historic dates using ISO8601. In addition, TEI is widely used
by archives and libraries to mark up texts, including ISO8601 dates
(http://www.tei-c.org/Guidelines/P4/html/ref-DATE.html). Since
authors are already publishing dates online, surely HTML5 should
accept all ISO8601 dates rather than a limited subset, which requires
additional processing on the part of authoring and publishing
software to filter out valid dates that are invalid HTML5.
Regards
Jim
Jim O'Donnell
[email protected]
http://eatyourgreens.org.uk
http://flickr.com/photos/eatyourgreens
http://twitter.com/pekingspring
