[xsl] Xsl:if to determine if any node matches

I have an XSL file which generates a calendar and an XML file which
represents the month and events which occur during the month.

The XML file representing the events is:

<?xml version="1.0" encoding="utf-8"?>
<month start="1" days="31" num="10" year="2006" today="12">
        <name>October 2006</name>
        <Events>
                <Event>
        
<GroupGUID>7F4616F5-BEB6-4A68-87E9-3FAD45BD25CB</GroupGUID>
                        <EventID>1</EventID>
                        <EventTitle>Fundraiser</EventTitle>
                        <StartDate>2006-10-09T00:00:00</StartDate>
                        <EndDate>2006-10-11T00:00:00</EndDate>
                        <Depth>1</Depth>
                        <Date>
                                <EventDateID>1</EventDateID>
                                <EventDate>2006-10-09T00:00:00</EventDate>
        
<EventStartTime>2006-10-09T09:00:00</EventStartTime>
        
<EventEndTime>2006-10-09T21:00:00</EventEndTime>
                        </Date>
                        <Date>
                                <EventDateID>2</EventDateID>
                                <EventDate>2006-10-11T00:00:00</EventDate>
        
<EventStartTime>2006-10-11T09:00:00</EventStartTime>
        
<EventEndTime>2006-10-11T21:00:00</EventEndTime>
                        </Date>
                </Event>
                <Event>
        
<GroupGUID>7F4616F5-BEB6-4A68-87E9-3FAD45BD25CB</GroupGUID>
                        <EventID>2</EventID>
                        <EventTitle>Fundraiser</EventTitle>
                        <StartDate>2006-10-12T00:00:00</StartDate>
                        <EndDate>2006-10-12T00:00:00</EndDate>
                        <Depth>1</Depth>
                        <Date>
                                <EventDateID>1</EventDateID>
                                <EventDate>2006-10-12T00:00:00</EventDate>
        
<EventStartTime>2006-10-12T09:00:00</EventStartTime>
        
<EventEndTime>2006-10-12T21:00:00</EventEndTime>
                        </Date>
                </Event>
        </Events>
</month> 

In the XSL I attempt to determine if the current date in the loop exists in
the event list. ($index-$start+1 represents the current date)

<xsl:choose>
        <xsl:when test="(substring(//EventDate/., 9, 2) = $index - $start
+1)">
                <xsl:element name="a">
                        <xsl:attribute
name="href">javascript:viewDate(<xsl:value-of select="$index - $start
+1"/>);</xsl:attribute>
                        <xsl:value-of select="$index - $start + 1"/>
                </xsl:element>
        </xsl:when>
        <xsl:otherwise>
                <xsl:element name="a">
                        <xsl:attribute
name="href">javascript:void(0);</xsl:attribute>
                        <xsl:value-of select="$index - $start + 1"/>
                </xsl:element>
        </xsl:otherwise>        
</xsl:choose>

The problem I've encountered is the test only seems to match the first
instance of the /Events/Event/Date/EventDate as opposed to any of the
instances of EventDate. So my resulting HTML has the 9th highlighted, but
not the 11th or 12th.

I could loop through all of the EventDates using for each, but that would
seem wasteful to loop through a potentially large XML for every day of the
month.

Does anyone have any thoughts on why it's only matching the first instance
of EventDate?

David Steketee
____________________
technology consultant
http://www.visualstructures.com/
(P) 917-432-4459


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