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Gavin Thomas Nicol wrote - > > Maybe you could view an element as being instances of two types > > at the same time: the type defined by the attribute set and > > the type defined by the non-attribute content. What a wierd > > thought! > > I've come to believe that documents are always of an infinite > number of types! So yes, I think you can easily say > > foo.xml *conforms* to type specification A based on it's > attributes. > > foo.xml *conforms* to type specification B based on it's > content structures. > > foo.xml *conforms* to type specification C based on the > combination of it's elements and attributes. > A reverse way to put it is this: for any instance (document), there are an infinite number of schemas for which it is valid. For a practical example, get XMLSpy to reverse engineer a schema for some xml instance. It does the best it can, but it's not usually a terribly general, well-architected schema (it's often a good starting pooint, though). Tom P
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