[xsl] merging 2 xml's to 1 xml

["Joeri Belis" <joeri.belis@xxxxxxxxxxxx>]

merging 2 xml's to 1 xml

xml 1 ( and my source xml )

<root>
  <row>
   <cell>
    <data>1</data>
    <namedcell name="linenr">
   </cell>
   <cell>
    <data>100</data>
    <namedcell name="article">
   </cell>  
  </row>
</root>

xml that i import via the document function

<root>
   <orderlines linenr="1">
   <article>77</article>
   <orderlines linenr="2">
   <article>88</article>
   <orderlines linenr="3">
   <article>99</article>
</root>

Now i want to get the following output xml.
i want to use the namedcell attribute name to make the match.
so i can add more elements to the import xml.

I tried several approached but now i am stuck.
I can't figure out how to get the elements from the import file
and match the to my source. 

<root>
  <row>
   <cell>
    <data>1</data>
    <namedcell name="linenr">
   </cell>
   <cell>
    <data>77</data>
    <namedcell name="article">
   </cell>  
  </row>
  <row>
   <cell>
    <data>2</data>
    <namedcell name="linenr">
   </cell>
   <cell>
    <data>88</data>
    <namedcell name="article">
   </cell>  
  </row>
  <row>
   <cell>
    <data>3</data>
    <namedcell name="linenr">
   </cell>
   <cell>
    <data>99</data>
    <namedcell name="article">
   </cell>
  </row>
</root>



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