- From: Henry S. Thompson <ht@inf.ed.ac.uk>
- Date: Fri, 29 May 2009 13:41:19 +0100
- To: www-tag@w3.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 In the TAG meeting of 28 May, Tim Berners-Lee criticised the admittedly _ad-hoc_ methodology of the evidence I presented there [1], wrt the question of what the relative scale of usage is as between W3C XML Schema and other schema languages. I just tried another, also ad-hoc, one: Google says there are approx 255000 hits for training "xml schema" and approx. 248000 hits for training "xml schema" -relax and approx 14600 hits for training "relax ng" and approx 12100 hits for training "relax ng" -"w3c xml schema" which suggests that the Web thinks there's a bigger market for training Schema as opposed to Relax, by an order of magnitude, but I expect there are flaws in that too. . . Google finds approx 24300 hits for "XML Schema Part 1: Structures" and approx 2920 hits for "Relax NG Specification" but that's looking in a rather different direction. . . I agree with what Larry Masinter said, that there is no problem with multiple specifications in this area, and I admire both Relax NG and Schematron, and still use DTDs as well. The _only_ reason for pursuing this question is to rebut the proposition, often advanced but not, to my knowledge, ever substantiated, that W3C XML Schema is not used very much, so e.g. delaying the next version is not a big deal. Tim BL says, in the above-cited minutes: But what about private use behind firewalls? In an earlier email Paul Cotton cited some Google code figures (again showing roughly an order of magnitude imbalance towards XSD) and then said: Personal opinion: I expect that the ratio in enterprise systems whose code stores are not visible to a tool like "Google code" that this ratio would be even more slanted towards XML Schema. All of which raises the question: What _would_ constitute reliable evidence of frequency of usage of the four major schema languages (DTD, XSD, Relax NG, Schematron)? Note once again in closing that this is _not_ a "my language is better than your language because more people are using it" discussion, but rather an attempt to support the proposition that maintaining and improving W3C XML Schema is important for W3C because it has a substantial user community on (and off) the Web. ht [1] http://www.w3.org/2001/tag/2009/05/28-minutes.html#item05 - -- Henry S. Thompson, School of Informatics, University of Edinburgh Half-time member of W3C Team 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 651-1426, e-mail: ht@inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFKH9fvkjnJixAXWBoRAu7nAJ4iVB9hBOHjdtbg5CSgbIWBuprHEgCfToLW mgi+UEWw+d2bHtdNF2Ab2Tc= =ZBLI -----END PGP SIGNATURE-----
Received on Friday, 29 May 2009 12:41:52 UTC