%bookcustom-classes.ent;
DTD-Specific Class Customizations Module
Set up the Parameter Entities and element class definitions that will be used to over-ride some element classes in the DTD Suite.
Model
<!ENTITY % bookcustom-classes.ent PUBLIC "-//NLM//DTD BITS Book Interchange DTD Customize Classes Module v2.0 20151225//EN" "BITS-bookcustom-classes2.ent" >