Re: ATTN: Please comment on XHTML (before it's too late)
David Megginson wrote: > > That violates the basic rule of isolating complexity: if 99.9% of > processes will need to treat the three XHTML Namespaces as equivalent > (and I think that Tim's throw-away number was, if anything, a gross > underestimate -- I cannot imagine even 1 in 1000 processes caring > about the difference between transitional and strict), then it is > unjustifiable to force each process to manage the equivalences itself. I don't think that they should. I think that we should work a universal top-level equivalence mechanism that can be implemented with reusable engines. This is vital *anyhow* because e-commerce and EDI need it. > Even if there is, some day, a top-level equivalence-mapping feature, > people would still be forced to define the top-level mappings. Big deal. Defining the mappings is easier than defining the DTDs. In the case of these three DTDs, in fact, the equivalence is A is a subset of B which is a subset of C, right? So let's make a REC that allows us to say that and get on with life! A year ago you described an equivalence-describing system (for instances, not entire namespaces) that was only a few pages of prose and a few hundred lines of Java. For document types as closely related as the three HTMLs we could define a mechanism in one page of normative prose. I will almost always fight the idea of sweeping a problem under the carpet in order to "solve it later." It is twice as hard to fix it later. The infoset is the perfect example. We've got incompatibilities between XPath and the DOM up the wazoo because the XML working group swept the XML data model problem under the carpet. We are establishing a precedent and a principle here. Elements types with different content models are different. Applications need to be able to detect that difference. That HTML is typically so lax and loose that nobody cares is not really the issue. Paul Prescod xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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