ODD to DTD problems #2

[lb42]

A DTD must contain 5 parameter entities for each model class defined, with names consisting of the model class name suffixed by each of the "methods" sequence, alternate etc. The declarations look like this

<!ENTITY % testClass "x |y |z"> 
<!ENTITY % testClass_sequence "x, y, z"> 
<!ENTITY % testClass_sequenceOptional "x?, y?, z?"> 
<!ENTITY % testClass_sequenceOptionalRepeatable "x*, y*, z*"> 
<!ENTITY % testClass_sequenceRepeatable "x+, y+, z+"> 

However, an ODD declaration like this

      <elementSpec ident="testP3">
          <content>
            <classRef key="testClass" expand="alternate" except="z"/>
          </content>
        </elementSpec>

generates DTD like this

      <!ELEMENT testP3 (((%testClass_alternate;)))>

which is wrong because there is no such parameter entity, independently of being inadequate because it ignores the @except attribute.

See further the attached test file testClass.zip