JAXB Flags an Error in XML Doc Related to a Choice of Elements

Question

With a fairly complex DTD, an error results when JAXB unmarshalls a valid XML document. Here is the relevant DTD fragment:
<!ELEMENT Declaration (Variable+, (typeList | Drelation))>
The elements Variable and Drelation are complex, and contain other elements. Element typeList contains only #PCDATA. If Varaible is followed by Drelation, everything is fine, but if Variable is follwed by typeList, then unmarshall reports the following error:
Exception in thread "main" javax.xml.bind.UnrecognizedElementNameException: typeList
I know there is not a real error, because I have validated the XML document against the DTD using Xeena, from IBM's Alphaworks.

Answer 1

By way of additional information, I tried to circumvent the problem with the following change.
<!ELEMENT Declaration (Variable+, DecType)>
<!ATTLIST Declaration dpower (PowerSet) #IMPLIED>
<!ELEMENT DecType (typeList | Drelation)>
Now, each element is either a sequence or a choice, but not both. The result was the same problem. The unmarshall reports the same error when it gets to the DecType element, saying the typeList element is unexpected. Again, IBM's Xeena tool reports that the XML document is valid for the DTD.
Here is the relevant XML fragment.
<Declaration dpower="PowerSet">
<Variable> members </Variable>
<DecType> <typeList> Person </typeList> </DecType>
</Declaration>
Is this a JAXB error?