Schema aware parsing bug

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Hi,

I try to parse a document schema aware. There is an attribute defined as 
fixed="yes". Even if the attribute is not present in the source, it will 
be present in the JDOM Element. This should be the behavior of 
default="yes" if the attribute is not present.
Semantically the fixed='yes' means the default is 'no' if the attribute 
is not present.
This has currently a huge impact we have @invalid='yes' fixed by a 3rd 
party schema.

I use Oracle JAVA 1.8.0_51 and put a simple test to show the error in 
the attachment. Hope that it can be fixed soon...

regards,

Thomas

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 name="SchemaBug.java"
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 filename="SchemaBug.java"

import java.io.IOException;

import org.jdom2.Document;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.jdom2.input.sax.XMLReaders;
import org.jdom2.output.XMLOutputter;

public class SchemaBug {
    
    public static void main(String...arg) throws JDOMException, IOException{
        SAXBuilder builder=new SAXBuilder(XMLReaders.XSDVALIDATING);
        Document document = builder.build("schemabug.xml");
        XMLOutputter xout=new XMLOutputter();
        xout.output(document, System.out);
    }

}

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Content-Type: text/xml;
 name="schemabug.xml"
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 filename="schemabug.xml"

<?xml version="1.0" encoding="UTF-8"?>
<test 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="schemabug.xsd"
 />
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 name="schemabug.xsd"
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 filename="schemabug.xsd"

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <xs:element name="test" type="testDefinition" />
  <xs:complexType name="testDefinition">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="optional" default="yes" type="xs:string" />
        <xs:attribute name="fixed" fixed="yes" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
</xs:schema>
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