ok, I found an error in my second xpath expression.
After getting the list of elements having a uid attribute, I used "//[EMAIL 
PROTECTED]
= myuid]" on it.
That started searching for elements at the root again, what I wanted to
avoid.

Now I'm using "[EMAIL PROTECTED] = myuid]" instead, what also doesn't work 
properly.
The problem is, that in XPath::findChildren, a tester is used to check all
child elements of the context node
if the element's names match (since I'm using a *, all elements match).
It uses 
child = context->getFirstChild() 
to get the first element, and then 
child = child->nextSibling()
to iterate thru the elements.

But this nextSibling() returns the next sibling in the original document,
not the next element in the nodeset!
so only the two products are found (because they're siblings in the
document) but not the articles 
(which would be in the nodeset, but are children of the products in the
document)

is there a workaround for this problem?

bye
King Nak
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