What's up when xmlns expression is not well formed ?
if scheme data in a pointer part with the xmlns() scheme does not conform to the syntax defined, the pointer part does not contribute an entry to the namespace binding context.Given a simple xml :
<customer xmlns="http://example.org/customer">
<name xmlns="http://example.org/personal-info">John Doe</name>
</customer>
The following expression:
xmlns(c=http://example.org/customer) xmlns(bad_expression) xmlns(p=http://example.org/personal-info) xpointer(/c:customer/p:name)
Will result (no exception) <name xmlns="http://example.org/personal-info">John Doe</name>