Standards Reference
Browse BDNS, Haystack, UDMI, MQTT, and JSON specifications
V2.12
BDNS Ontology V2.12
Building Device Naming Standard - standardized abbreviations and naming conventions for building devices
890 entries
4.0
Haystack Definitions
Project Haystack 4.0 tag definitions for semantic tagging of building equipment and points
672 entries
4.0
Haystack Prototypes
Pre-defined equipment prototypes with required and optional tags
1,071 entries
1.5.2
UDMI Schema
Universal Device Management Interface - schema for device metadata and telemetry payloads
5.0
MQTT Topics
MQTT topic structure and naming conventions for device communication
JSON Payload Examples
Example JSON payloads for metadata, telemetry, and QR code data