Question

I’ve got an XML that I’m trying to transform which contains a relation between different nodes, related via ID, but I can’t figure out how to ‘glue’ them together.

XML example:

<order>
 <products>     
  <product id="1234">
   <item quantity="5" colour="red">
   <item quantity="2" colour="blue">
  </product> 
  <product id="9876">
   <item quantity="10" colour="teal">
  </product>
 </products>

 <prices>
  <productprice>
   <refProduct id="1234" />
   <price gross="9.99" />
  </productprice>
  <productprice>
   <refProduct id="9876" />
   <price gross="6.89" />
  </productprice>
 </prices>
</order>

My desireable outcome would be something like being able to display the products via a for-each, with their respective prices listed next to them.

Any clues gratefully received.

EDIT: fixed renegade products element, example should be well formed

Answer 1

Here is a simple proof of concept for making the connection you wanted. The input XML wasn’t well formed so I made the assumption there was only one products element, with multiple product children.

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:template match="/">
        <products>
            <xsl:for-each select="order/products/product">
                <product>
                    <xsl:variable name="productid" select="@id"/>
                    <xsl:attribute name="id">
                        <xsl:value-of select="$productid"/>
                    </xsl:attribute>
                    <xsl:attribute name="price">
                        <xsl:value-of
                            select="/order/prices/productprice[refProduct[@id = $productid]]/price/@gross"/>
                    </xsl:attribute>
                </product>
            </xsl:for-each>
        </products>
    </xsl:template>
</xsl:stylesheet>

It results in the following output:

<?xml version="1.0" encoding="utf-8"?>
<products>
    <product id="1234" price="9.99"/>
    <product id="9876" price="6.89"/>
</products>