[Qt-interest] Validating a DOMTree?

[B.W.H. van Beest]

Suppose I have an XML file, structured according a certain scheme.
Then I read this file into a QDomElement, thus creating a DOM tree.
Next I want to modify the DOMTree, by adding/removing elements etc.
However, I want to allow only actions that are mandated by the
underlying schema.
In other words, how can I validate a DOM object tree against a certain
schema.
Any suggestion how that can be done are welcome.

Regards,
Bertwim