Does anyone know if XSLT 2.0 supports converting time to minutes?

where

<dateTime>2008-11-21T01:05:00-06:00</dateTime>

would return 65 minutes

Try this:
minutes-from-dateTime()

------
Rummy

Sorry Try this:
<xsl:template match="dateTime">
        <xsl:variable name="a1" select="."/>
        <xsl:variable name="a2">
            <xsl:value-of select="hours-from-dateTime($a1) * 60 + minutes-from-dateTime($a1)"></xsl:value-of>
        </xsl:variable>
        <xsl:value-of select="$a2"></xsl:value-of>
    </xsl:template>

------
Rummy

Something like this, assuming dateTime is typed by the schema as xs:dateTime:

(dateTime - xs:dateTime(xs:date(dateTime))) div xs:dayTimeDuration('PT1M')

If it's not schema-aware, do xs:dateTime(dateTime) to convert the untyped value to a dateTime first.

Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference