[FS] IBM-FS-105: Inferred type of fn:sum with one argument

Hello,

     The following is a comment from IBM on the Last Call working draft of 
Formal Semantics.


Section 6.2.6

The paragraph between the two inference rules for fn:sum indicates, "The 
second form of fn:sum takes one argument, with an implicit second argument 
of the integer value 0.  In this case, the result type is the union of 
target type T and xs:integer."  However, F&O section 15.3.5 states "If the 
converted sequence is empty, then the single-argument form of the function 
returns the xs:double value 0.0e0."

The inference rule here needs to be made consistent with the description 
in F&O.

Thanks,

Henry (on behalf of IBM)
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Henry Zongaro      Xalan development
IBM SWS Toronto Lab   T/L 969-6044;  Phone +1 905 413-6044
mailto:zongaro@ca.ibm.com