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Subject: Re: [xacml] xpath-expression datatype
On Thu, 2004-08-26 at 10:53, Polar Humenn wrote:
> It is a "base type", and therefore you will not see it in anything.
What? Because string, integer, or boolean is a basetype, do I also not
see them in anything? No. I see them in functions. I see them in
normative behavior. I see many justifications for why they exist in the
specification.
> > I think it will cause a great deal of confusion to have a datatype that
> > goes unused.
>
> Why are you confused? The fact that every time you use a specific
> construct, i.e. <Apply>, <AttributeValue>, etc. you are using
> <ExpressionType>, just because you don't see it on paper? It is a function
> of the compiler, not of the user.
I think you should go back and read my original email again. I'm not
talking about the Expression element. I'm fine with that. I'm talking
about a new datatype called xpath-expression.
> > In fact, we have three functions that use XPath
> > expressions, but they define their parameters in terms of strings, which
> > I think will further confuse people.
>
> Where did this come from? Now we are talking about the arguments to
> expressions. XPath expressions are not in the type system of the XACML
> language. They are an element of XPATH, and defined there. We can only
> have them as strings, unless, you want to bring all of XPATH into XACML.
Again, please re-read my previous email. I think you'll find that we're
in agreement on this point.
seth
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