So, are you saying that you want to transform this,:
<xsd:element name="SUBSTREAM">
   <xsd:complexType>
      <xsd:sequence>
         <xsd:element name="SUBSTREAM_length" type="xsd:short"/>
          <xsd:element name="SUBSTREAM_interior" type="mctf:Sub"/>
       </xsd:sequence>
    </xsd:complexType>
</xsd:element>

into this?:
<xsd:simpleType name="Sub">
 <xsd:restriction base="bs1:byteRange">
    <xsd:annotation>
      <xsd:appinfo>
         <bs2:length alue="SUBSTREAM_length"/>
      </xsd:appinfo>
    </xsd:annotation>
  </xsd:restriction>
</xsd:simpleType>

--
Charles Knell
cknell@xxxxxxxxxx - email