simple-base-string
The base string types.
common-lisp
base-string length
simple-base-string length
length
The length of the string (or *, meaning any).
*
base-string and simple-base-string are the types of base strings and simple base strings respectively.
base-string
bmp-string text-string Character and String types
LispWorks User Guide and Reference Manual - 13 Feb 2015