JAXB compiler problem in handling xsd:any and nillble = "true"

Dear all,
i am using jdeveloper 10.1.3.1 production release version.
i am designing a xml schema that contain element of attribute nillable="true", for extensible, contain tag <xsd:any>.
but i encounter 2 problem:
1. for xml schema element with attribute nillable="true", no corresponding isNil(), setNil
method is generated (refer to jaxb 1.0 spec. 5.7.1)
2. cannot handle tag <xs:any> that generate incorrect java source code (cannot compile) [refer to jaxb 1.0 spec 5.9.5)
*** i have add jaxb customization tag inside the <xs:any> tag
***   <xs:annotation><xs:appinfo>
***               <jaxb:property name="Extension"/>
***</xs:appinfo></xs:annotation>
Does oracle's JAXB implementation conform to the JAXB 1.0 spec?
Is it a known bug?
Could anybody help me?

Refer to section
E.2 Not Required XML Schema
concepts
"A JAXB implementation is not required to support the following XML Schema
concepts for this version of the specification. A JAXB implementation may
choose to support these features in an implementation dependent manner."
E.2.2 Not supported while manipulating the XML
content
Schema component: wildcard
(any)
how can i know if an xml element with xsi:nil="true" (unmarshal)
and set xsi:nil="true" for an element (marshal) ?
According to the JAXB 1.0 specification:
If {nillable} is "true", the methods setNil() and isNil() are
generated.

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Hi!
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description The server encountered an internal error () that prevented it from fulfilling this request.
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compile it, success then run it in IE, same error!!!.
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Refer to section
E.2 Not Required XML Schema
concepts
"A JAXB implementation is not required to support the following XML Schema
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E.2.2 Not supported while manipulating the XML
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(any)
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According to the JAXB 1.0 specification:
If {nillable} is "true", the methods setNil() and isNil() are
generated.

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parsing a schema...
An interface with the same name "generated.FooType" is generated from more than one schema component.
line 10 of sample.xsd
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line 23 of sample.xsd
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=============
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=============
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=============
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