An external module in the Archiving and Interchange DTD Suite.
Names all the external modules (except itself and the Customization Module) that are part of the Archiving and Interchange DTD Suite. A DTD selects from these modules by referencing the external Parameter Entities defined in the Module to Name the Modules. To include a set of elements (such as all the lists or the MathML elements), a DTD references the external Parameter Entity of the module that contains desired elements, such as the list or MathML declarations.
<!ENTITY % modules.ent PUBLIC "-//NLM//DTD Archiving and Interchange DTD Suite Module of Modules v1.0 20021201//EN" "modules.ent" >