Azure Digital Twins now supports defining models using the Digital Twins Definition Language version 3 (DTDL v3). This release enables you to leverage many improvements and core features of DTDL v3 such as using arrays in properties and providing semantic types using the ‘QuantitativeTypes’ feature extension.
To learn more, visit the modelling guide. For a full language description of DTDL v3, visit the DTDL version 3 language description page in GitHub.