[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Identifying XML Document Types (was XML media types revisited)
At 03:12 PM 1/15/99 -0500, Simon St.Laurent wrote: >Perhaps I'm being a little too hard, but none of these solutions seem >viable. You're correct: none of them are viable, because they do not create self-describing objects. What is needed is a mechanism that allows a document to unambiguously point to the definition of what it is, from which applications can then determine the right thing to do. MIME types go a long way, but they are managed outside the document, leaving open the question "how do I know what MIME types to associate with a document?". Note that the external identifier of the doctype declaration, if there is one, *CANNOT BE THIS POINTER* because it simply identifies an entity with some declarations in it, from which you can reliably infer nothing. Schema-use declarations (many have been proposed) and architecture use declarations (the new PI-based syntax) are examples of workable solutions because they point to authoritative definitions of what the rules for the document are. Note that architecture use declarations are standardized today and trivially easy to implement support for. The external identifier for the architecture definition itself can be anything, including public IDs and MIME types. Cheers, E. -- <Address HyTime=bibloc> W. Eliot Kimber, Senior Consulting SGML Engineer ISOGEN International Corp. 2200 N. Lamar St., Suite 230, Dallas, TX 75202. 214.953.0004 www.isogen.com </Address> 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/ 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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