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Re: Time for an exslt for 2.0?

2005-05-12 05:10:22


When I looked at these, I promptly
realised the benefit, and implemented my own attribute in gexslt with
identical semantics.

since the semantics in that case were those spec'ed out by Michael, an
alternative strategy would have been to implement them in saxon's
namespace. 

As Dmitre pointed out, for two processors this is
just about OK, but if more and more implementations were to do the
same thing, it would be frightfully messy to read, and a real pain to
have to keep adding new attributes for each new processor.

This is true, although the situation isn't so bad as in XSLT1 (where
every implementation has an xx:node-set() function but writing a
stylesheet in a portable way meant coding an xsl:choose switch on each
invocation. xsl:function means that it's only the function author
(Dimitre in this case) who has the hassle (and he can make a
compile-time switch using use-when so there is no run time cost for the
user) The end user can use some portable function in a fixed namespace
(fxsl in this case or some stylesheett specififc namespace if the
stylesheet and function authors are in fact the same person).

 It might be useful
to have a set of standard collation names with known properties.

It certainly would, but as you comment this is anyway under discussion
and a set standardised under an exslt namespace might turn out to be
more of a problem than a help longer term if there ends up being a set
standardised somewhere else.

I'm sure that there will be a need for common extensions, and I'd urge
that they be kept within the exslt namespace/project if at all
possible. (It may be that a different subgroup of people may need to be
coopted to manage an xslt2 area or exslt, but that's presumably a
subject for an exslt list not here)

David

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