Sometimes library packages consist of one public load file and a number of files used by this load file, exporting predicates that should not be used directly by the end user. Such a library can be placed in a sub-directory of the library and the files containing public functionality can be added to the index of the library. As an example we give the XPCE library's MKINDEX.pl, including the public functionality of trace/browse.pl to the autoloadable predicates for the XPCE package.

:- prolog_load_context(directory, Dir),
   make_library_index(Dir,
                      [ '*.pl',
                        'trace/browse.pl',
                        'swi/*.pl'
                      ]).