Comparing Integers

Hello...

I have set up some tests to compare Integers, but wish to refine the
comparison. I have some xml:

<submissionDeadline>2027-10-04T09:00:00.0000000-00:00</submissionDeadline>
<submissionDeadline>2007-10-03T09:00:00.0000000-00:00</submissionDeadline>
<submissionDeadline>2007-10-01T08:00:00.0000000+01:00</submissionDeadline>
<submissionDeadline>2007-09-10T12:00:00.0000000+01:00</submissionDeadline>


This is selected and concatenated into an integer:

<xsl:variable name="submissionDeadlineString"
select="concat(substring(submissionDeadline, 1,4)... etc etc

I then concatenate the current time / date etc:

<xsl:variable name="currentTime">2007-10-04T09:00:00.0000000+01:00</xsl:variable>
<xsl:variable name="currentTimeString"
select="concat(substring($currentTime, 1,4)....etc etc

...then test against each other:

<xsl:when test="$currentTimeString &lt; =
$submissionDeadlineString"><xsl:call-template
name="ontime"/></xsl:when>

I would like to be able to test for 4 different outcomes, ontime,
within24Hours, within10Days and past10Days. I have set up variable and
tests thus far:

<xsl:variable name="currentTime">2007-10-04T09:00:00.0000000+01:00</xsl:variable>
<xsl:variable name="currentTimeString"
select="concat(substring($currentTime, 1,4)....etc etc
<xsl:variable name="within24Hours"
select="number($submissionDeadlineString + 1000000)"/>
<xsl:variable name="within10Days"
select="number($submissionDeadlineString + 1000001)"/>
<xsl:variable name="past10Days"
select="number($submissionDeadlineString + 10000001)"/>

<xsl:choose>
<xsl:when test="$currentTimeString &lt; =
$submissionDeadlineString"><xsl:call-template
name="ontime"/></xsl:when>
<xsl:when test="$currentTimeString &lt; =
$within24Hours"><xsl:call-template
name="twentyFourHourRule"/></xsl:when>
<xsl:when test="$currentTimeString &lt; =
$within10Days"><xsl:call-template name="tenDayRule"/></xsl:when>
<xsl:when test="$currentTimeString &gt; =
$past10Days"><xsl:call-template name="plusTenDay"/></xsl:when>
</xsl:choose>

...so far, only the "ontime" and "plusTenDay" tests work.

Am I headed in the right direction? Can anyone offer any advice please?

Thank you.