◇◆

%toc-nav.ent; BITS Structural Table of Contents Module

Element declarations for the BITS navigation and pointing mechanism for structural Indexes and tables of Contents.

<!ENTITY % toc-nav.ent  PUBLIC
"-//NLM//DTD BITS Table of Contents and Index Navigation v2.2 20250930//EN"
"BITS-toc-index-nav2-2.ent"                                          >