Source:http://linkedlifedata.com/resource/umls/id/C1555713
HL7V3.0: <p>A group of entries within a composition or topic that have a common characteristic - for example, Examination, Diagnosis, Management OR Subjective, Objective, Analysis, Plan.</p><p>The distinction from Topic relates to value sets. For Category there is a bounded list of things like "Examination", "Diagnosis" or SOAP categories. For Topic the list is wide open to any clinical condition or reason for a part of an encounter.</p><p>A CATEGORY MAY CONTAIN ENTRIES.</p>