External module in the Article Authoring DTD (Pumpkin) that declares Parameter Entities of element class definitions to over-ride element classes in the base DTD Suite
<!ENTITY % articleauthcustom-classes.ent PUBLIC "-//NLM//DTD Article Authoring DTD Over-ride Classes Module v2.1 20050630//EN" "articleauthcustom-classes.ent" >
articleauthcustom-modules.ent