Controls the behavior if name clashes occur in object creation.
Determines behavior when creating a new named KB object with the same name as an existing KB object.
The possible values are:
Signals a error Continuing will replace the old object with the new object.
Signals a warning and replaces the old object with the new object.
Replaces the old object with the new object.
KnowledgeWorks and Prolog User Guide (Unix version) - 22 Dec 2009