compare dayTimeDuration ?

[Michael Kay]

> >
> >           if ($r1 <= $v1) then
> >        *       if ($r2 <= $v1) then xs:boolean(false)*
> >               else xs:boolean(true)
> >           else
> >               if ($r1 <= $v2) then xs:boolean(true)
> >               else xs:boolean(false)
> >
> > [...]
> 
> Sébastien,
> 
> there are no literals `true' and `false' in XQuery.  Use the 
> built-in functions fn:true() and fn:false() instead.

And of course the expression

if ($r1 <= $v2) then xs:boolean(true)
> >               else xs:boolean(false)

can be simplified to

($r1 <= $v2) 

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