Re: xdt:dayTimeDuration casting issue

Hi,

I am using Saxon 8.7.3J and having an issue casting a string to
xdt:dayTimeDuration for use in  days-from-duration()

The error I'm getting is:

Cannot find a matching 1-argument function named
{http://www.w3.org/2005/xpath-datatypes}dayTimeDuration()

I've checked that the namespace is correct
(xmlns:xdt=http://www.w3.org/2005/xpath-datatypes). The exact usage is:

<xsl:value-of
select="days-from-duration(xdt:dayTimeDuration(dates/duration))"/> where
dates/duration is P0Y3M3DT12H

 FORG0001: Invalid duration value 'P0Y3M3DT12H' (non-numeric or
out-of-range component)

..so your duration value isn't valid.  You appear to have included
years and months, whereas it only allows days and a time (the allowed
format is "PnDTnHnMnS") see:

Also, I believe the only prefix to use these days is xs:* (although
Saxon seems to work with both).

cheers
andrew