How to disable UPA errors?

[Roger L Costello]

Hi Folks,



The Unique Particle Attribution (UPA) error is driving me crazy.



UPA doesn't make sense in a DFDL schema because the DFDL properties eliminate 
the ambiguity.



Here's a schema that produces a UPA error:


<xs:element name="record">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="Section_Code" type="fixedLength_string" 
dfdl:length="1"/>
            <xs:choice dfdl:choiceDispatchKey="{Section_Code}">
                <xs:sequence dfdl:choiceBranchKey="D">
                    <xs:element name="Subsection_Code" 
type="fixedLength_string" dfdl:length="1"/>
                </xs:sequence>
                <xs:sequence dfdl:choiceBranchKey="E">
                    <xs:element name="Subsection_Code" 
type="fixedLength_string" dfdl:length="1"/>
                </xs:sequence>
            </xs:choice>
        </xs:sequence>
    </xs:complexType>
</xs:element>



The UPA error occurs because there are two Subsection_Code elements within the 
record element. If this was a plain XML Schema, then I can understand the UPA 
error because an XSD validator wouldn't know whether to use the first or the 
second Subsection_Code element to validate XML. But this isn't a plain XML 
Schema, it is a DFDL schema and the choiceBranchKey let's us know that the 
first Subsection_Code should be used when the Section_Code = D, the second 
should be used when Section_Code = E.



Is there any way to disable UPA errors?



/Roger