[Bug 3718] fn:index-of

http://www.w3.org/Bugs/Public/show_bug.cgi?id=3718





------- Comment #2 from tim@cbcl.co.uk  2006-09-13 15:37 -------
Fair point.  The reason we came across this was because under the Formal
Semantics normalization  for function calls, we get:

fn:index-of($seqParam as xs:anyAtomicType*, $srchParam as xs:anyAtomicType)

fn:index-of(
  fs:convert-simple-operand(
    fs:data($seqParam as xs:anyAtomicType*),
    PrototypicalValue(xs:anyAtomicType))
  fs:convert-simple-operand(
    fs:data($srchParam as xs:anyAtomicType*)),
    PrototypicalValue(xs:anyAtomicType)))

I haven't found a definition for the PrototypicalValue for xs:anyAtomicType. 
(The spec does define it as an xs:double for numeric arguments).

Our resolution has been to choose the PrototypicalValue based on whether we are
dealing with avg, min, max, sum (treat as xs:double) or index-of,
distinct-values (treat as xs:string).