'the object'? At least post the relevant jpdl snippet and if possible the relevant part of the xsd.
Sorry, wrong translation from Italian.. not object but subject (of the topic!).+
The problem is in jpdl language. I tried to make a 'mail' node so the sintax is:
<mail g="graphic position" language="juel" name="node name">
The validator says "cvc-complex-type.3.2.2: Attribute 'language' is not allowed" underlining the word "language".
juel is the default, afaik, so a language should not be needed. Might be that it is not fully configurable at that level yet.