Here is a simple Ontology:      Person Mother Father Child Boy Girl Gender Male Female We read the Ontology like this: Mother is a Person Father is a Person Child is a Person Boy is a Child is a Person Girl is a Child is a Person Male is a Gender Female is a Gender If the “X is a Y” relation are logical (does the relationship make sense in the real world ?), then the Ontology class hierarchy is valid.    Here's an example of an invalid Ontology class hierarchy:     Person Father Male      This model asserts that “Male is a Father”. Or, if you... [More]

Tags:  watson partonomy hierarchies taxonomy taxonomies practices best_practices ontologies best ontology modeling