Display Element Back Matter Class Elements
Easily confused with the parameter entity %display-back-matter; that presents a structured sequence involving similar elements (<attrib> and <permissions>). This structured sequence is used at the end of boxed text, a figure, or similar display element within this Tag Set only. The OR group named in %display-back-matter.class; is used in all four of the Tag Sets.
<!ENTITY % display-back-matter.class "attrib | permissions" >