XSL Template

Hi Experts,

I am developing the report in XSL Format and I have some questions.

1.How to display the values in the single row. Please see the below code. In the below code I am using two columns and I need to do Group by on the both columns. can any one let me know how to do this.

<Worksheet ss:Name="Sudhir">
 <Table x:FullColumns="0" x:FullRows="0">
  <xsl:for-each-group select="ROW" group-by="CATEGORY">   
    <Row>     
    </Row>  
    <Row>
     <Cell ss:Index= "1" ss:StyleID="x1"><Data ss:Type="String"><xsl:value-of select="CATEGORY"/></Data></Cell>
    </Row>
   <xsl:for-each-group select="current-group()" group-by="PARTNER_GROUP">