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Use "assertional" in a sentence
"Ontology Population (assertional component/description base) 6 Knowledge Agents, one for each database; writing agents took about a day"
"Descriptional component (schema) designed by domain experts; Description base (assertional component, extension) by automated processes"
"OWL ontology automatically based on domain & range constraints, cardinality restrictions, and usage of the classes in data (when there is ABox, i.e., assertional, data in your ontology)."