Class comprising the <label> element, which can be used to hold the pre-generated or author-provided number or symbol of a labeled object such as a footnote (“3” or “*”) or a table wrapper (“Table 6”)
The Label Class Elements parameter entity was created as a means of constraining use of the <label> element in the Book Tag Set and Collection Tag Set.
<!ENTITY % label.class "label" >
default-classes3.ent