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At least in Jaxen, we view variables as, well, variable.
Users use them to create sort of 'prepared-statements' that can
be parameterized upon evaluation.
We allow a user to swap out the VariableContext (the name->value
lookup index) between evaluations. But, we might be taking a
liberal view, because we also allow users to swap out the
FunctionContext and NamespaceContext at will.
-bob
On Wed, 13 Nov 2002 AndrewWatt2000@aol.com wrote:
> I love the way that W3C specifications can sometimes throw up disconnected
> questions.
>
> In the XForms 1.0 CR the phrase, "XPath variables that change in value from
> one recalculate to the next ..." started me thinking about just what I think
> I know about "XPath variables".
>
> Tacitly, I think I had assumed that "XPath variables" are immutable, possibly
> because I typically meet variables in connection with XPath expressions in
> the context of XSLT 1.0.
>
> A quick look through XPath 1.0 REC and XPath 2.0 WD revealed remarkably
> little information about "XPath variables". I certainly couldn't find
> anything to confirm my earlier tacit assumption that they are immutable.
>
> In fact, I am even beginning to wonder if XPath variables actually exist.
> .... Not, of course, that that is a question of life or death! :)
>
> Andrew Watt
>
>
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--
Bob McWhirter bob@werken.com
The Werken Company http://werken.com/
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