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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML Schema: DOs and DON'Ts
 First off let me say thanks for writing up this document-- while I don't agree with several parts I find it very informative and useful-- > > But my point is that when you use attribute groups you *are* using local > > attribute declarations. The attribute > > Right. But I want readers to understand that <attribute> is allowed only > under an <attributeGroup>, just like DTD. People don't need to learn > another way to do the same thing. One is enough. One of the biggest issues I am struggling to understand is your rationale against local attribute declarations. It seems to be 100% in contrast to your rationale against global complexTypes. In global complexTypes the only additional learning is how to refer to them-- which seems to correspond with the additional reference to an attributeGroup. While I am happy to see attributeGroup survive the simplicity surgery, I think it is at odds with the basic nature of your document. As far as "learning another way to do the same thing" I disagree. You would be learning less if attributeGroup were excluded in favor of local attributeDeclarations to begin with. It is simply a matter of placement of the attribute declaration-- which is easier than understanding the attributeGroup syntax. Granted if you recommended only using local attribute declarations you would lose some significant features-- but isn't that the purpose of the document? IMHO I think that attributeGroup is not on the first level of simplicity-- it is on the second, with global complex types. Somewhere on the third level of simplicity/difficulty is type-substitution and inheritence. The fourth level is reserved for qualified/unqualified and importing/redifining. It seems a reformulation of the document based on levels of difficulty regardless of feature loss might hit your target audience a little better. All of that said, I do like the document-- keep up the good work. Thanks, Jeff Rafter Defined Systems http://www.defined.net XML Development and Developer Web Hosting 
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