Hi,
I am trying to create a key and group by attribute matching. The XML file is as follows;
<view>
    <name>TEST</name>
    <sort order="0" col="col1" visible="1">asc</sort>
    <filter>
        <condition>
            <column>col1</column>
            <comparison>=</comparison>
            <value>dat1</value>
        </condition>
        <condition>
            <column>col2</column>
            <comparison>=</comparison>
            <value>dat2</value>
        </condition>
    </filter>
    <column name="col1">Column1</column>
    <column name="col2">Column2</column>
    <column name="col3">Column3</column>
    <column name="col4">Column4</column>
    <line>
        <value name="Column1">dat1</value>
        <value name="Column2">dat2</value>
        <value name="Column3">dat3</value>
        <value name="Column4">dat4</value>
    </line>
    <line>
        <value name="Column1">dat1</value>
        <value name="Column2">dat2</value>
        <value name="Column3">dat3</value>
        <value name="Column4">dat4</value>
    </line>

</view>


I am trying to use the key as :==

<xsl:key name="mkt" match="view" use="concat(value[name='Column1'], '~', value[name='Column2'])"/>

And, then I tried to display for each as below :-

xsl:for-each select="line[count(. | key('mkt', concat(value[name='Column1'], '~', value[name='Column2]))[1]) = 1]">
<tr>
<td align="middle"><xsl:value-of select='value name="Column1"]'/></td>
<td align="middle"><xsl:value-of select='value name="Column2"]'/></td>
<td align="middle"><xsl:value-of select='value name="Column3"]'/></td>
<td>

I know the above is not correct but not sure if this is syntactically correct. Please advise.

Thanks,

This isn't going to work because in the key definition, you are matching view elements, and the use expression selects value as a child of view, but view does not have a child called value.

I can't correct it for you as I don't actually know what you are trying to achieve.

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