string,
vector,
array,
sequence,
t
A string is a specialized vector
whose elements are of type character or a suptype of type character.
When used as a type specifier for object creation,
string means (vector character).
Abbreviating.
(string [size])
size—a non-negative fixnum, or the symbol *.
This denotes the union of all types
(array c (size))
for all subtypes c of character;
that is, the set of strings of size size.
Section 16.1 (String Concepts), Section 2.4.5 (Double-Quote), Section 22.1.3.4 (Printing Strings)