Class OtherExp

This primitive has no meaning to MSV. For example, the following expression

 Expression exp = new OtherExp( pool.createSequence(a,b) );
 

 Expression exp = pool.createSequence(a,b);
 

By using this "transparency", application can implement derived classes of OtherExp and add application-specific information to AGM.

For example, you can implement AnnotationInfoExp class that derives OtherExp and introduces "documentation" field. Then you'll write a customized XMLSchemaReader that parses <annotation> tag and mix AnnotationInfoExp into an AGM. Your application can then examine it and do some useful things.

Those application-specific information added through OtherExp are completely ignored by MSV. So the annotated AGM can still be used just like anormal AGM.