xml-dev - Q: tool for merging two DOM trees?

["E.L. Willighagen" <egonw@sci.kun.nl>]

Hi all, i am looking for a tool two merge two DOM trees containing the following XML data:

DOM1:
<themes>
  <theme id="appl">
    <title xml:lang="nl">Toepassingen</title>
  </theme>
</themes>

DOM2:
<themes>
  <theme id="appl">
    <title xml:lang="en">Applications</title>
  </theme>
</themes>

The output should be something like:

<themes>
  <theme id="appl">
    <title xml:lang="en">Applications</title>
    <title xml:lang="nl">Toepassingen</title>
  </theme>
</themes>


Thus:
1. every node available twices -> one is removed
2. child nodes which are different -> merge

Is there a tool available for this purpose? (Any programming language.)

yours,

Egon Willighagen