Recursive function referencing an XML file, best prog

This is more of a programming technique question than a how to.

I'll be creating a recursive function in XSLT that will manipulate a tokenized
string (on spaces), capitalize initial letter in each word and lower case the
rest of the word. An issue arises for product names and acronyms, as the way
they are spelt is quite specific. So I'll create a library XML file that will
contain the correct spelling for these strings and do a check on each string.

So my question is,

What is the best method to call the library XML file? As a parameter into the
function (placing the content of the library into a variable that is placed
into the function), a straight <value-of
select="doc('file:///pathto/library.xml')..." /> each time the function is
called, or does it really matter as it might make no difference or discernable
difference? (I'll be parsing 400+ files all less than 30k.)

Just trying to find the best method someone with a programming background and
education (read post secondary education in computer science) would use.

Marijan (Mario) Madunic
Publishing Specialist
New Flyer Industries

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