Background: The Ontology of Medically Related Social Entities (OMRSE) was initially developed in 2011 to provide a framework for modeling demographic data in Resource Description Framework/Web Ontology Language. It is built upon the Basic Formal Ontology and conforms to Open Biomedical Ontologies Foundry's best practices.
Description: We report recent development of OMRSE which includes representations of organizations, roles, facilities, demographic data, enrollment in insurance plans, and data about socio-economic indicators.
Conclusions: OMRSE's coverage has been expanding in recent years to include a wide variety of classes and has been useful in several biomedical applications.
Keywords: OMRSE; Ontology; Organizations; Social entities; Social roles.