[xacml] comments on functions v13

1. I notice function:decimal-mod is not included.
Was this intentional?
I personally do not think it is necessary, but it was originally specified.
2. Typo: dateTime-greater-than-or-equal is specified twice.
The second time, the heading should be "dateTime-less-than-or-equal" (the text below is OK)
3. Are the dateTime-add-*Duration and dateTime-subtract-*Duration functions mandatory?
I believe they are, but just want to be sure.
Anne

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Anne H. Anderson
Email: 
Sun Microsystems Laboratories 1 Network Drive,UBUR02-311
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