[xsl] using node-set() extension function across vendors

["Abie Hamaoui" <ahama5@xxxxxxxxxxx>]

hello again all,
I have a stylesheet that I want to be able to run using saxon 
(ver.6.5/xsl-ver.1.1) and msxsl (ver.3/xsl-ver.1.0).  I want to be able to 
create variables to use as regular trees.

both vendors have a node-set() extension function, but the problem is that 
they use dif't namespaces:
msxsl:node-set() and saxon:node-set().

is there a way to define a namespace prefix <<extra>> that will take on 
dif't namespace uri's depending on a test, eg 
"urn:schemas-microsoft-com:xslt" or "http://icl.com/saxon"; depending on a 
check of system-property()?

(I think I could just test for function-available(msxsl:node-set) each time, 
or the like, but it seems more elegant to make this determination just 
once.)

thanks in advance.
abie

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