Why can i promote property fields in BizTalk 2006 but distinguished fields are disabled?

Question

I have a very strange behaviour in the Show Promotions Dialog in BizTalk 2006. It allows me to promote property fields:

But distinguished fields are disabled:

Any thoughts?

---

This is the XML Schema generated by the SQL Transport Schema Generation Wizard:

<?xml version="1.0" encoding="utf-16" ?> 
<xs:schema xmlns:b="http://schemas.microsoft.com/BizTalk/2003" xmlns="http://ExecutionPlanner.InitializeStep" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://ExecutionPlanner.InitializeStep" version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:appinfo>
      <msbtssql:sqlScript value="exec [InitizializeStep] @ORCHESTRATION_NAME=" ", @PROVIDER_NAME=" ", @STEP_NAME=" "" xmlns:msbtssql="http://schemas.microsoft.com/BizTalk/2003" /> 
    </xs:appinfo>
  </xs:annotation>
  <xs:element name="Step">
    <xs:complexType>
      <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="OrchestrationID" type="OrchestrationIDType" />
        <xs:element name="Message" type="MessageType" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="OrchestrationIDType">
    <xs:simpleContent>
      <xs:extension base="xs:string" />
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="MessageType">
    <xs:simpleContent>
      <xs:extension base="xs:string" />
    </xs:simpleContent>
  </xs:complexType>
</xs:schema>

Answer 1

Edit your schema to change the OrchestrationID field from a Record to a Field Element. Only Elements and Attributes can be distinguished.

This usually entails deleting the existing Record element, then re-creating an Element with the same name, as Visual Studio wont allow changing an xml node's type. However, you can get around this by opening the xsd file using the XML (Text) Editor using the 'Open With...' option.