From: John Halleck (John.Halleck_at_utah.edu)
Date: Tue Feb 13 2001 - 20:08:08 CET
Received: (from mdom_at_localhost) by karto.ethz.ch (8.9.3/8.9.3/SuSE Linux 8.9.3-0.1) id UAA00752 for cavexml-outgoing; Tue, 13 Feb 2001 20:08:12 +0100 Received: from cor.oz.cc.utah.edu (nahaj_at_cor.oz.cc.utah.edu [155.99.2.2]) by karto.ethz.ch (8.9.3/8.9.3/SuSE Linux 8.9.3-0.1) with ESMTP id UAA00748 for <cavexml_at_cartography.ch>; Tue, 13 Feb 2001 20:08:11 +0100 Received: from localhost (nahaj_at_localhost) by cor.oz.cc.utah.edu (8.9.2/8.9.2) with ESMTP id MAA25031 for <cavexml_at_cartography.ch>; Tue, 13 Feb 2001 12:08:08 -0700 (MST) Date: Tue, 13 Feb 2001 12:08:08 -0700 (MST) From: John Halleck <John.Halleck_at_utah.edu> To: cavexml_at_cartography.ch Subject: Re: defaulting units for measurements In-Reply-To: <20010213184652.HJOD19514.t21mta02-app.talk21.com_at_t21mtaV-lrs> Message-ID: <Pine.GSO.4.05.10102131202160.21309-100000@cor.oz.cc.utah.edu> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cavexml_at_karto.baug.ethz.ch Precedence: bulk Reply-To: cavexml_at_cartography.ch
On Tue, 13 Feb 2001 martinl_at_talk21.com wrote:
> [...]
> 2 There is a problem identified long
> ago by Mike Lake in that IDs should be valid XML Names which means (amongst other things)
> that they MUST begin with a letter; this example is ok, but all those surveys with integer
> station numbers (as recently suggested) would be invalid. (Of course, you could get round
> this with prefixes ...)
Another problem is that ID's aren't typed.
If you have ID's in station names, and ID's in something else (ratings for example),
then "A1" as a station name ID also becomes something that an IDREF in ratings would
point to.
That is yet another reason that you might want prefixes, they can keep different "types"
of ID's separate. (But prefixes are not enforcible in DTD's...)
> [...]
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