================================================================= Logtalk - Object oriented extension to Prolog Release 2.20.0 Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved. ================================================================= To load all entities in this example compile and load the loader file: | ?- logtalk_load(loader). You will also need to load the library file hierarchies_loader. Alternatively, you may load the library all_loader file to load all library entities. This example is an adaptation of a LPA Prolog++ example that is described in the LPA Prolog++ Reference Manual. This manual can be downloaded from the LPA web site . Please consult this reference manual for further informations about this example.