buildingSMART Data Dictionary (bSDD)

buildingSMART’s service for sharing definitions for describing the built environment to help everyone use agreed and consistent terms


What is the bSDD?

About Content Purpose

The bSDD is a collection of interconnected data dictionaries with definitions of terms to describe the built environment. The service is provided by buildingSMART for free, to enable easy access from all software solutions.

The content is published by independent organisations, spanning international classifications, national standards and company-specific agreements.

Search the bSDD content

e.g. wall, or volume

or browse popular data dictionaries

by buildingSMART International

by ETIM International

by NBS

by Molio

or access the content through software

Revit plugin
by VolkerVessels, Heijmans

by IfcOpenShell Contributors

by ACCA Software

by Plannerly

Get familiar with the bSDD

Basics Demos Other

Do you have questions about bSDD?

Integrate bSDD


The bSDD API is the primary interface to interact with the bSDD database. Read more about bSDD data structure and how to integrate with the bSDD in our documentation for software developers. Ask technical questions and get notified about latest technical updates by subscribing to our forum.

The bSDD is a Strategic Project supported by: