in addition to Jirka's comments, you pretty much have to use a catalog or some such anyway (in which case the about: URI is as resolvable as an http one). Even for DTD that are apparently resolvable such as http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd If you actually GET that URI more than a few times the W3C will cut you off with a 503 code, to prevent their servers being overloaded http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic So the difference between an about: URI scheme and an http: one is not as great as may seem. DavidReceived on Saturday, 2 January 2010 20:50:11 UTC
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