From:	Tony McConnell [tony.mcconnell@ultra-controls.com]
Sent:	13 May 2010 14:09
To:	Tim Wright
Subject:	DATEX2 Schema

Hi Tim,

Sorry to bother you with this, apologies if you aren’t the correct person to contact.

Is it correct that the modelBaseVersion of the D2LogicalModel type, and targetClass attribute 
of other types, are defined in the schema so that they default to xs:anySimpleType?

For example:

  <xs:complexType name="D2LogicalModel">
    <xs:sequence>
      <xs:element name="exchange" type="D2LogicalModel:Exchange" />
      <xs:element name="payloadPublication" type="D2LogicalModel:PayloadPublication" 
minOccurs="0" />
      <xs:element name="d2LogicalModelExtension" type="D2LogicalModel:_ExtensionType" 
minOccurs="0" />
    </xs:sequence>
    <xs:attribute name="modelBaseVersion" use="required" fixed="2.0RC2" />
  </xs:complexType>

The lack of explcit type for the attribute causes it to default to xs:anySimpleType. 

Wouldn’t this be more logical as xs:string?

The same applies to the targetClass attribute. For example:

  <xs:complexType name="_CatalogueVersionedReference">
    <xs:complexContent>
      <xs:extension base="D2LogicalModel:VersionedReference">
        <xs:attribute name="targetClass" use="required" fixed="Catalogue" />
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
 
Best Regards 
 
Tony McConnell 
Principal Engineer Bsc(Hons) LPIC-1 CEH CLA
Ultra Electronics Controls 
 
Taylor House, Caxton Road, Fulwood, Preston, PR2 9ZB 
Tel: 01772 907488 (Direct Line) 
Fax: 01772 907501 
Email: mailto:tony.mcconnell@ultra-controls.com  
Web: http://www.ultra-controls.com