XSLT's with Cocoon

I am using Cocoon 1.5 with XSL:P which implements the XSLT WD 1.0 19990421. The next release of Cocoon will support XT, but I would like to get my current problem solved using an "official" release of Cocoon, and I seem to be stuck with XSL:P.

I want to detect a change in the value of <STAT_CATEGORY> for each <ROW>. I thought I could create <xsl:variable>s to save the last <STAT_CATEGORY>, but I soon found out that this is not possible! So I read up on XPath and XSLT working drafts, and only recently discovered that XSL:P implements a relatively old version. Because Cocoon does not give me any clue to any XSL processing errors or warnings, I have done a lot of trial and error trying to figure this out.

I am using the following edited XML data (re-formatted by hand because the SQLProcessor doesn't have a "pretty" option):

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="dashboard.xsl" type="text/xsl"?>
<?cocoon-process type="xslt"?>
<page>
<ROWSET>
<ROW ID="0">
<ORDER_NBR>0</ORDER_NBR>
<STAT_CATEGORY>Sales</STAT_CATEGORY>
<STAT_TITLE>SS Sales</STAT_TITLE>
<SAMPLE_VALUE>-999</SAMPLE_VALUE>
</ROW>

<ROW ID="1">
<ORDER_NBR>0</ORDER_NBR>
<STAT_CATEGORY>Sales</STAT_CATEGORY>
<STAT_TITLE>SS Sales</STAT_TITLE>
<SAMPLE_VALUE>118487391.17</SAMPLE_VALUE>
</ROW>

<ROW ID="9">
<ORDER_NBR>4</ORDER_NBR>
<STAT_CATEGORY>Sales</STAT_CATEGORY>
<STAT_TITLE>Total Sales</STAT_TITLE>
<SAMPLE_VALUE>289400790.91</SAMPLE_VALUE>
</ROW>
<ROW ID="10">
<ORDER_NBR>5</ORDER_NBR>
<STAT_CATEGORY>GP</STAT_CATEGORY>
<STAT_TITLE>SS GP</STAT_TITLE>
<SAMPLE_VALUE>-999</SAMPLE_VALUE>
</ROW>
<ROW ID="11">






My dashboard.xsl file looks like this (edited):

    <xsl:template match="ROWSET">
        <TABLE border="2" width="80%" cellspacing="1" cellpadding="1">
            <xsl:for-each select="ROW">
                <xsl:choose>
                    <xsl:when test="SAMPLE_VALUE=(-999)">
                        <xsl:value-of select="../ROW[@ID=(current()/@ID-1)]/@ID"/>;
                        <xsl:value-of select="from-preceding-siblings(.[position()=1]/@ID)"/>;
                        <xsl:choose>
                            <xsl:when test="not(//ROW[@ID=(../@ID-1))]/STAT_CATEGORY = STAT_CATEGORY)">
                                <TR>
                                    <xsl:apply-templates/>
                                </TR>
                            </xsl:when>
                        </xsl:choose>
                    </xsl:when>
                    <xsl:otherwise>
                        <TR>
                            <xsl:apply-templates/>
                        </TR>
                    </xsl:otherwise>
                </xsl:choose>
            </xsl:for-each>
        </TABLE>
    </xsl:template>


I'm obviously using the <xsl:value-of> to print out some values to see if they will work in a test attribute. The first one is what I think it should be. The second one is my attempt at using the 19990421 WD. The <xsl:when> is an example of what does not work, as explained in the most recent WD (but I have it in there so I can get some sort of output).

So, my question is, how do I do this with XSL:P and XT?


cheers,
    Simon



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