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[xsl] [Summary] 4 equivalent XPath expressions for concatenating three arguments

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Hi Folks,

Here are 4 equivalent XPath expressions for concatenating 'Section' and ': '
and 1 to produce 'Section: 1'. The latter 3 use XPath 3.0 capabilities,
particularly partial function application and specifying the arity of the
concat function.

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XPath #1
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concat('Section', ': ', 1)

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XPath #2
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let $concat3 := concat#3  		(: Specify the arity of the concat function :)
return $concat3('Section', ': ', 1)

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XPath #3
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let $concat3 := concat(?,?,?)		(: Partial function application :)
return $concat3('Section', ': ', 1)

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XPath #4
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let $concat3 := concat#3('Section', ?, ?)
return $concat3(': ', 1)

/Roger

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