PROBLEMS JAXB and XML-schema

Question

Hello,
I think my problem is not directly related to JAXB but to my understanding of schema-files.
I defined a schema like that:
<xsd:complexType name="BSR">
<xsd:sequence>
<xsd:element name="VERB" type="VERB"/>
<xsd:element name="NOUN" type="NOUN"/>
<xsd:element name="REVISION" type="REVISION"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="VERB">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="value" fixed="ACKNOWLEDGE"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:complexType name="NOUN">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="value" fixed="PO"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:complexType name="REVISION">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="value" fixed="003"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
When I tried to compile that schema via JAXB I got the following error:
[ERROR] A property with the same name "value" is generated from more than one schema component line 31 of ACKNOWLEDGE_PO_003.xsd
[ERROR] (Relevant to above error) another one is generated from this schema component. line 14 of datatypes.xsd
[...] and so on!
How do I manage to use that attribute "value" in several elements???
Is there a possibility to declare the attribute once an refer to it, like to an type?
Please help, I could not find anythig in docu.
thanX chris

Answer 1

hallo again,
i tried that, but the point is, if i remove the declaration of the attribute called "value" it works fine.
<xsd:element name="BSR">
          <xsd:complexType>
               <xsd:sequence>
                    <xsd:element ref="VERB"/>
                    <xsd:element ref="NOUN"/>
                    <xsd:element ref="REVISION"/>
               </xsd:sequence>
          </xsd:complexType>
     </xsd:element>
     <xsd:element name="VERB">
          <xsd:complexType>
               <xsd:simpleContent>
                    <xsd:extension base="xsd:string">
                    </xsd:extension>
               </xsd:simpleContent>
          </xsd:complexType>
     </xsd:element>
     <xsd:element name="NOUN">
          <xsd:complexType>
               <xsd:simpleContent>
                    <xsd:extension base="xsd:string">
                    </xsd:extension>
               </xsd:simpleContent>
          </xsd:complexType>
     </xsd:element>
     <xsd:element name="REVISION">
          <xsd:complexType>
               <xsd:simpleContent>
                    <xsd:extension base="xsd:string">
                    </xsd:extension>
               </xsd:simpleContent>
          </xsd:complexType>
     </xsd:element>
I can compile it that way! but i need these attributes called "value" as you see them above....
so i think i worked out, that the problem is not in the "BSR"-tag, but the 3-times occurrence of the attribute "value".