Two very similar beans, but no common class/interface

[Nick Burch]

Hi All

For Apache POI, we're using xmlbeans to generate a whole bunch of classes
based on the ooxml schema files. One problem we've found is that some
things hold a CT_RPr, and others hold a CT_ParaRPr. Despite these two
entries being very similar, the two classes don't have a common class or
interface. So, we can't write code to work with the common bits of both
these entries very easily.

Is it possible to get xmlbeans to generate these two classes to share a
common superclass or interface, so we can easily get at the common parts?

The full schema is at http://people.apache.org/~nick/wml.xsd, and the
relevent bit is:
  <xsd:complexType name="CT_RPr">
    <xsd:sequence>
      <xsd:group ref="EG_RPrContent" minOccurs="0"></xsd:group>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:complexType name="CT_ParaRPr">
    <xsd:sequence>
      <xsd:group ref="EG_ParaRPrTrackChanges" minOccurs="0"></xsd:group>
      <xsd:group ref="EG_RPrBase" minOccurs="0"></xsd:group>
      <xsd:element name="rPrChange" type="CT_ParaRPrChange" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Revision Information....</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:group name="EG_RPrContent">
    <xsd:sequence>
      <xsd:group ref="EG_RPrBase" minOccurs="0"></xsd:group>
      <xsd:element name="rPrChange" type="CT_RPrChange" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Revision Information for....</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
    </xsd:sequence>
  </xsd:group>

(We're generally just after the common bits of EG_RPrBase on both CT_RPr
and CT_ParaRPr)

Thanks
Nick

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