a list, the elements of which are implementation-dependent,
but which must contain at least the symbols
&allow-other-keys
,
&aux
,
&body
,
&environment
,
&key
,
&optional
,
&rest
,
and
&whole
.
A list of all the lambda list keywords used in the implementation, including the additional ones used only by macro definition forms.
defun, flet, defmacro, macrolet, Section 3.1.2 (The Evaluation Model)