[Exist-open] Bug in xsl:format-dateTime() function

[Joe W. <jo...@gm...>]

Hi all,

The xsl:format-dateTime() function in trunk (rev. 14306) is imposing the
current timezone on its output instead of respecting the timezone of its
input dateTime.

To see what I mean, observe how I the current dateTime's timezone is still
returned in the current timezone even when I adjust it to GMT.

query:

xquery version "1.0";
import module namespace xsl="http://www.w3.org/1999/XSL/Transform";
let $current := current-dateTime()
let $picture := 'F, DD MMMM YYYY hh:mm:ss Z'
let $current-formatted := xsl:format-dateTime($current, $picture)
let $adjusted-to-GMT := *adjust-dateTime-to-timezone*($current,
xdt:dayTimeDuration("PT0H"))
let $adjusted-formatted := xsl:format-dateTime(*$adjusted-to-GMT*, $picture)
return
 <results>
   <current>{current-dateTime()}</current>
   <current-formatted>{$current-formatted}</current-formatted>
   <adjusted-to-GMT>{$adjusted-to-GMT}</adjusted-to-GMT>
   <adjusted-formatted>{$adjusted-formatted}</adjusted-formatted>
 </results>

I would expect $adjusted-formatted to be GMT (*+0000*) rather than the
original formatted timezone (EST *-0400*):

<results>
 <current>2011-05-04T16:11:44.557-04:00</current>
 <current-formatted>Wed, 04 May 2011 04:11:44 *-0400*</current-formatted>
 <adjusted-to-GMT>2011-05-04T20:11:44.557Z</adjusted-to-GMT>
 <adjusted-formatted>Wed, 04 May 2011 04:11:44 *-0400*</adjusted-formatted>
</results>

Is this a bug?  Or is xsl:format-dateTime() supposed to impose the current
timezone on its results?

Thanks,
Joe