RE: xdt:yearMonthDuration eq xs:duration

> With your comment in that bug report as background; doesn't 
> it mean that any 
> comparison involving xdt:dayTimeDuration and 
> xdt:yearMonthDuration always 
> will evaluate to false

No, 

xdt:dayTimeDuration('PT0S') = xdt:yearMonthDuration('P0M')

will return true.

> 
> Why is it of interest to have the following expression return false?
> 
> op:duration-equal(xs:duration("P1Y"), xs:duration("P365D"))
> 

Because (for example) if you are doing grouping using xsl:for-each-group or
distinct-values(), then you want these values to end up in different groups.


Michael Kay
http://www.saxonica.com/