◇◆

%bookcustom-modules.ent; Module to Name DTD-Specific Modules

Names all DTD-specific external modules
Declaration
<!ENTITY % bookcustom-modules.ent
                        PUBLIC
"-//NLM//DTD BITS Book Interchange DTD-Specific Modules v2.2 20250930//EN"
"BITS-bookcustom-modules2-2.ent"                                     >