Namestrings always use local file system case conventions,
but Common Lisp functions that manipulate pathname components
allow the caller to select either of two conventions for representing
case in component values by supplying a value for the
:case
keyword argument.
Figure 19–2 lists the functions
relating to pathnames that permit a :case
argument:
make-pathname pathname-directory pathname-name pathname-device pathname-host pathname-type Figure 19–2: Pathname functions using a :CASE argument