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Re: multiple types (Re: attribute order)
- From: "Thomas B. Passin" <email@example.com>
- To: firstname.lastname@example.org
- Date: Fri, 30 Mar 2001 21:42:47 -0500
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
> 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).