<!ENTITY % a.common
"id ID #IMPLIED
label CDATA #IMPLIED
type CDATA #IMPLIED">
%a.common = commonly used attributes
The label attribute should contain a shortened or alternative name for the element or its contents. The label's most frequent use is in dynamically-generated lists or tables of contents. The type attribute provides a mechanism for grouping elements primarily for later processing, e.g. by a stylesheet, or for extending the semantics of the element.