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### 9.1 Lisp Pathnames

There are many aspects of ANSI Common Lisp's pathname support which are implementation-defined and so need documentation.

#### 9.1.1 The SYS Logical Pathname Host

The logical pathname host named by `"SYS"` exists in SBCL. Its `logical-pathname-translations` may be set by the site or the user applicable to point to the locations of the system's sources; in particular, the core system's source files match the logical pathname `"SYS:SRC;**;*.*.*"`, and the contributed modules' source files match `"SYS:CONTRIB;**;*.*.*"`.