Here are some examples of lines in the PathMap file, which relates short names of directories in the web to their pathnames (see `What is a `short reference'?'):
contrib contrib fortran lang/fortran ileaf_bas dtp/ileaf/basics
The first line says that short name `contrib' refers to subdirectory `contrib' of the help root.
The second line says that short name `fortran' refers to subdirectory `fortran' of subdirectory `lang' of the help root.
The third line says that short name `ileaf_bas' is actually located at `dtp/ileaf/basics' relative to the help root.