What I make of it
Upper ontology under 21 other OBO ontologies, and standardised as ISO/IEC 21838-2.
BFO (Basic Formal Ontology)
Ontology / Vocabulary
Cross Domain
openly published
The Basic Formal Ontology (BFO) is a small, upper level ontology that is designed for use in supporting information retrieval, analysis and integration in scientific and other domains. BFO is a genuine upper ontology. Thus it does not contain physical, chemical, biological or other terms which would properly fall within the coverage domains of the special sciences. BFO is used by more than 550 ontology-driven endeavors throughout the world....
Other cross domain data models
BPMN (Business Process Model and Notation)
Metadata Model
Creative Commons Rights Expression Language (ccREL)
Ontology / Vocabulary
CloudEvents
Exchange Schema
CMMN (Case Management Model and Notation)
Metadata Model
W3C CSV on the Web (CSVW)
Metadata Model
Data Vault 2.0
Metadata Model
DMN (Decision Model and Notation)
Metadata Model
Event Ontology
Ontology / Vocabulary
FOAF
Ontology / Vocabulary
Frictionless Data Package / Table Schema
Metadata Model
IAO (Information Artifact Ontology)
Ontology / Vocabulary
iCalendar / jCal (RFC 5545, 7265)
Information Model