JAXB binding compiler error "Unique Particle Attribution"

Question

I'm trying to compile an xsd but get an error:
parsing a schema...
[ERROR] cos-nonambig: "":SomeData and WC[##any] (or elements from their substitution group) violate "Unique Particle Attribution".
line 4 of TestCase.xsd
Failed to parse a schema.
I've narrowed the error down to this test case:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 &nbsp <xs:element name="AnElement" type="AnElementType"/>
 &nbsp <xs:complexType name="AnElementType">
   &nbsp <xs:sequence>
     &nbsp <xs:element name="SomeData" type="xs:string" minOccurs="0"/>
     &nbsp <xs:any minOccurs="0"/>
   &nbsp </xs:sequence>
 &nbsp </xs:complexType>
</xs:schema>
If I remove the 'minOccurs' from the 'SomeData' element, it compiles fine. Any ideas on why Sun's JAXB compiler doesn't like this xsd?
Thanks,
Josh

Answer 1

Does modifying the schema remove the error?
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="AnElement" type="AnElementType"/>
<xs:complexType name="AnElementType">
<xs:choice>
<xs:any minOccurs="0"/>
<xs:sequence>
<xs:element name="SomeData" type="xs:string" minOccurs="1"/>
<xs:any minOccurs="0"/>
</xs:sequence>
</xs:choice>
</xs:complexType>
</xs:schema>
thanks,
Deepak