US Patent 11200376 Expanded concept matching

Methods, systems, and computer program products for expanded concept matching are provided. Aspects include receiving an ontology, determining a set of target concepts, building a cache from the ontology, the cache comprising a set of expressions extracted from the ontology for each target concept in the set of target concepts, receiving a document, determining a first segment of text in the document based on the set of target concepts, and annotating the first segment of text by comparing the set of target concepts to the set of expressions in the cache.