[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: A Plea for Schemas
Rick Jelliffe wrote: > > Tim is of course correct that a schema is only part of the whole > picture, but a schema language can be judged on how readily it allows > useful systems and tools to be built. Ok. Another way to look at it is to look at the frequency of change in the information and determine if a schema is an where in the process the schema is an effective tool. There are a lot of applications whose market loosely hangs in the "authoring" category. Is anyone applying schemas to dimensions for multi-dimensional database designs, yeVenerableHypercubes for online analytical processing? > That being so, it may be a strong > schema system is one which has some 'use' information as well as the > "pure" schemas: documentation, forms building, validation, style, etc.: > where the type information from the schema can directly be used for some > purpose. > > DTDs provide simple stucture models but also have infoset contributions > with #FIXED attributes and default attribute values (i.e., a simple > transformation of the instance). This makes them 'impure' as a schema > language, but undoubtedly more useful. Schemas that gracefully handle time volatility issues will be useful. However for that to work, the schema has to be dynamic, and I rather thought that was the attractiveness of XML schemas. I can instrument processes and use the events to modify a schema via the DOM, thus closing the loop. Better than hardwiring templates, I would think. len 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 unsubscribe, mailto:majordomo@i... the following message; unsubscribe 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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