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Re: the problem with include and import
- From: "G. Ken Holman" <gkholman at CraneSoftwrights dot com>
- To: xsl-list at lists dot mulberrytech dot com
- Date: Sun, 06 Jan 2002 11:06:45 -0500
- Subject: Re: [xsl] the problem with include and import
- Reply-to: xsl-list at lists dot mulberrytech dot com
At 2002-01-06 07:51 +0000, Matt G. wrote:
>It occurred to me, while I was considering the issues relating to
>stylesheet library modularity with respect to dynamic scoping, that global
>parameters and variables already present a problem (if I'm not mistaken).
I'm not sure what problems you are identifying.
>In my opinion, they ought to have been scoped to the file in which they're
>specified.
You can choose to do this by namespace-qualifying your variable names,
without changing the design of the language.
>I'm concerned that (assuming I'm not mistaken), if these issues aren't
>addressed, it may be very difficult for stylesheet libraries of any
>significant complexity to be developed and used, successfully.
I think you may be mistaken.
I've found the ability to declare a default value for a variable in a given
module and then import that module overriding the initial value for that
variable to be *very* powerful.
I've used namespace-qualified variable names in an imported stylesheet to
ensure an importing stylesheet cannot "accidentally" declare a variable
that would unintentionally override the variable used in the imported
stylesheet.
>Furthermore, this would also provide more static optimization
>opportunities to XSLT processors supporting some sort of evaluate()
>function which supports variable references.
I don't think losing the implementation benefits would be worth it.
........................ Ken
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