> I have another question: Another number is returned as type string.
> This represents time in minutes. For e.g for '315',  I want to do is
> format it as 5 hrs 15 mins.
> 
> The formula is:
> 
> mins = ( (315 mod 60) div 100 ) * 60
> hrs = 315 - (315 mod 60)
> 
> How can I do this in Xquery ? This data is returned in a 
> <JrnyTm></JrnyTm> tag.
> 

(Your previous question asked for an XSLT solution, you're now asking for
XQuery. In principle XQuery is off-topic for this list, but in practice, you
can use the same approach in both. But the decimal-format/format-number
solution I gave you earlier is XSLT-only)

You've got a choice between using numeric arithmetic or duration arithmetic.
It's probably cleanest to use duration arithmetic though it's a bit verbose.

declare variable $one-minute := xdt:dayTimeDuration('PT1M')

then

let $time := xs:integer(JrnyTm) * $one-minute,
    $hours := hours-from-duration($time),
    $minutes := minutes-from-duration($time)
return
    concat($hours, ' hrs ', $minutes, ' minutes ')

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