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Re: XHTML doctype and namespace lookups overwhelm w3.org servers?

From: Dave Raggett <dsr@w3.org>
Date: Fri, 10 Sep 1999 17:15:51 +0100 (GMT Daylight Time)
To: Jeff Mendenhall <jeff@directgoods.com>
cc: www-html@w3.org
Message-ID: <Pine.WNT.4.10.9909101713350.-206211@hazel.hpl.hp.com>
On Tue, 7 Sep 1999, Jeff Mendenhall wrote:

> Does a UA look up the DTD and namespace data from a w3.org
> server?  Does that mean w3.org servers will receive billions of
> hits per day? What happens if w3.org server is unavailable
> (viewing file from disconnected machine, or localized network
> outage, for example.)  How is caching of DTDs handled?

Browsers don't need to download the DTD to build the parse tree for
XHTML documents. This is one of the benefits of using XML - it makes
it very easy to create parse trees from well formed documents. The
DTDs are only needed if you want to validate your documents, and
can be cached as appropriate.

Regards,

-- Dave Raggett <dsr@w3.org> http://www.w3.org/People/Raggett
phone: +44 122 578 2984 (or 2521) +44 385 320 444 (gsm mobile)
World Wide Web Consortium (on assignment from HP Labs)
Received on Friday, 10 September 1999 12:13:35 GMT

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