From: "Chris Sells" <csells@sellsbrothers.com> Date: Wed, 7 Mar 2001 15:46:42 -0800

These are the outputs of my attempts to translate the native tz data into XML for easier parsing for applications other than implementations of the standard C routines related to time [1].

[1] www.sellsbrothers.com/tools/tz

Thanks. I couldn't find a DTD or schema for the XML you generate but I guess it's pretty easy to figure it out. But this brings up an important point: what should the DTD be? I know of one other effort to XMLize time zone data, namely, the effort to XMLize iCalendar. Wouldn't it make sense for us to base a tz DTD on that work? (For more about iCalendar, please see <http://www.ietf.org/html.charters/calsch-charter.html>) Some background: my impression is that XML is a bit of a hot potato among the iCalendar folks. iCalendar's VTIMEZONE objects can easily be expressed using XML, but iCalendar itself doesn't use XML (partly because it predates XML). There is some sentiment to move towards XML but it hasn't happened yet and may never happen. For more about the politics involved, please see <http://www.imc.org/ietf-calendar/mail-archive/msg05357.html>. If we want to use an XMLized VTIMEZONE, Tim Berners-Lee once talked about building a Resource Description Framework (RDF) model for iCalendar; see <http://www.w3.org/2000/01/foo>. (RDF is W3C's application of XML for the semantic web; see <http://www.w3.org/RDF/> for more.) Berners-Lee thought it was a pretty good match; see <http://lists.w3.org/Archives/Public/www-rdf-interest/2000Jan/0089.html>. That might be a good way to do it. It'd be a smaller project than what Berners-Lee was thinking of, since it would deal only with the minimum necessary to represent VTIMEZONE. If we're more conservative and want to use a hand-XMLized VTIMEZONE without RDF, then I would look at the work of Frank Dawson (of Lotus) et al. For example, iPlanet's calendar server supports an iCalendar XML DTD draft described in <http://developer.iplanet.com/docs/wpapers/calendar/ietf.txt>. That draft is a bit outdated now but it should be easy to adapt its DTD to match the VTIMEZONEs of the current iCalendar spec. While we're on the subject, Damon Chaplin of Ximian has written an tz-to-VTIMEZONE converter. Perhaps we can use that. See: <http://lists.ximian.com/archives/public/evolution-hackers/2000-December/0014...> (Hmm, maybe I should add some of this stuff to tz-link....)