[xsl] Merging attributes in one XML file with node values in another (identical structure)

["Minervini, Chris" <christopher.minervini@xxxxxxxxxx>]

O.K. here's my question.  It seems like it should be simple but I can't
figure it out.
I have two XML files. One with data in the node values, and one with
data in attributes. They have the same exact structure.

<a>
   <b>
      <node>1</node>
   </b>
   <c>
      <d>
         <node>2</node>
      </d>
   </c>
</a>

... and ...

<a>
   <b val="x">
      <node width="10"/>
   </b>
   <c>
      <d val="z">
         <node height="15"/>
      </d>
   </c>
</a>

As you can see the word "node" node appears at /a/b/node and a/c/d/node
but has two distinct values and attributes.
Is there a way to transform the first one with XSLT to produce the
following results:

<a>
   <b val="x">
      <node width="10">1</node>
   </b>
   <c>
      <d val="z">
         <node height="15">2</node>
      </d>
   </c>
</a>

...essentially combining the node values of one file with the attributes
in the other.
I've really been struggling with this. I was able to do it with
recursion, but I'm looking for a way to do it without using recursive
procedures. I don't think it's possible. Is it?

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