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On 24/10/2012 12:06, Costello, Roger L. wrote:
Hi Folks, It means that every operator / language construct allows any expression to appear as its operand, subject only to operator precedence and data typing constraints. For example, you can do 3 + max(for $i in 1 to 10 return (if ($i gt 5) then $i*3 else $i*2))) Contrast this with XSLT, which is not fully composable: XPath expressions can be used as operands to XSLT instructions, but not the other way around; similarly Java has constructs called statements that cannot be nested inside expressions. Michael Kay Saxonica
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