Re: Survey: Catalysis Templates
--- "W. Eliot Kimber" <eliot@i...> wrote: > Yes, this is I think the closest programming analog to document > architectures. When an element in a document is mapped to some > architectural element, you are saying "my element 'foo' conforms to the > rules for architectural element 'bar', in addition to whatever else I > might say a 'foo' is." That lets a user or processor of the document > know something about the elements in it without having to know > everything. I think that is analogous to saying "objects that implement > the 'foo' interface must provide properties A, B, and C, implement > methods D, E, and F, and accept messages G, H, and I". > > I like the interface analogy better than the "inheritance" analogy > because it stresses the contract aspect of the relationship and does not > imply any of the things that inheritance implies (which architectures do > not provide, not being about program objects but about inert data > elements). > > Cheers, > > E. I think an even better match from programming is the "Adapter" pattern from GoF. To quote from the book an Adapter is used to "Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces." If you change "class" to "document type" in the above, I think this gives a perfect description of the intent of document architectures. Toivo Lainevool  Design Patterns: Elements of Reusable Object-Oriented Software. Gamma, Helm, Johnson, Vlissides. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://messenger.yahoo.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/ 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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