ANSI Common Lisp 1 Introduction 1.4 Definitions 1.4.4 Interpreting Dictionary Entries
188.8.131.52 The "Class Precedence List" Section of a Dictionary Entry
This appears in the dictionary entry for a class,
and contains an ordered list of the classes defined
by Common Lisp that must be in the class precedence list of this class.
It is permissible for other (implementation-defined) classes
to appear in the implementation's class precedence list for the class.
It is permissible for
to appear in the implementation's class precedence list;
for details, see Section 4.2.2 Type Relationships.
Except as explicitly indicated otherwise somewhere in this specification,
no additional standardized classes may appear in
the implementation's class precedence list.
By definition of the relationship between classes and types,
the classes listed in this section are also supertypes of
the type denoted by the class.