[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 02:27 PM 1/15/99 -0600, W. Eliot Kimber wrote: >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?". > >[...] > >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. Schemas may be a good answer (if they kill the internal subset escape hatch), combining an assertion about document type with a way to check it. Is there any comparable 'architecture validation' process? Or are they just assertions? The only (obvious, anyway) flaw with these options are the need to load the document before you know if it's worth processing - but that may be seen as more a flaw of today's limited filesystems and transfer protocols, I suppose. We're getting there... Simon St.Laurent XML: A Primer / Cookies Sharing Bandwidth Building XML Applications (March) http://www.simonstl.com 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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