Complex sentence: In an ontology, formal names (which serve as unique identifiers) are assigned to each concept to create an explicit vocabulary about a subject in order to eliminate ambiguity to communicate precise meaning between machines, or between machines and humans.
Split into simpler sentences: In an ontology, formal names (which serve as unique identifiers) are assigned to each concept to create an explicit vocabulary about a subject. This is done to eliminate ambiguity to communicate precise meaning between machines, or between machines and humans.