logical-pathname
A pathname that uses a namestring syntax that is implementation-independent, and that has component values that are implementation-independent. Logical pathnames do not refer directly to filenames
!!! Barmar: Needs more description. e.g., an implementation-independent pathname that is automatically translated to a pathname when it is used. Relate to physical pathname.
Section 20.1 (File System Concepts), Section 2.4.8.14 (Sharpsign P), Section 22.1.3.11 (Printing Pathnames)