Fix support for XSD group

[ghilainm]

For the moment xs:group are handled the same way xs:complexType are handled if I am not wrong.

A new property is added to the type define with points to a type defined by the group. This should not be the case but rather all the property defined in the group should be copied in the type itself as if they were directly defined in the type.

[andrewbober]

Just confirming: Are you talking about group references or group definitions?

[ghilainm]

If I am not wrong group references. I have in my XSDs a group definition with all the message headers and those headers are referenced in all messages via a group a reference.

With your implement I have a new field messageHeader instead of having all the headers copied to each of the message directly at the root of the message.

[andrewbober]

Are you able to share the schema in question?

[ghilainm]

Example of definition of message group

 <xs:group name="MESSAGE">
    <xs:sequence>
      <xs:element name="messageSender" type="MessageSenderContentType">
        <xs:annotation>
          <xs:documentation>
            <description xmlns="" value="Message sender" />
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
  </xs:group>

Example of usage:

<xs:complexType name="SomeMessageType">
    <xs:sequence>
      <xs:group ref="MESSAGE" />
    </xs:sequence>
    <xs:attribute name="SomeAttribute" type="xs:token" />
  </xs:complexType>