Built Environment

10 data model standards serving built environment. Every one confirmed against its steward's own site.

Standard	Steward	Origin	Layer	Access	Modernity
ASHRAE 223P Semantic Data Model	ASHRAE	—	Ontology / Vocabulary	spec sold	41.4 Legacy
BACnet object model	ASHRAE / ISO 16484-5	—	Information Model	spec sold	50.0 Modernizing
Brick Schema	Brick Consortium	—	Ontology / Vocabulary	open	—
CityGML	Open Geospatial Consortium	International United States	Information Model	open	61.4 Modernizing
CityJSON	Open Geospatial Consortium / TU Delft	International United States	Exchange Schema	open	62.9 Modernizing
DALI (Digital Addressable Lighting Interface)	Digital Illumination Interface Alliance	—	Information Model	—	44.1 Legacy
IndoorGML	Open Geospatial Consortium	International United States	Information Model	open	53.5 Modernizing
MUDDI (Model for Underground Data Definition and Integration)	Open Geospatial Consortium	International United States	Information Model	open	—
Project Haystack	Project Haystack	—	Ontology / Vocabulary	open	72.7 Current
gbXML (Green Building XML)	gbXML.org	—	Exchange Schema	—	48.4 Legacy