An Architectural Approach for Enhanced Data Interoperability Across Building Systems. Yefi, P., Ejaz, S., Menon, R. P., Eicker, U., & Gu�h�neuc, Y. In Nguyen, K. K. & Tsiropoulou, E. E., editors, Proceedings of the 7<sup>th</sup> Conference on Cloud and Internet of Things (CIoT), pages 1&ndash;8, October, 2024. IEEE CS Press. 10 pages.
An Architectural Approach for Enhanced Data Interoperability Across Building Systems [pdf]Paper  abstract   bibtex   
Access to building data is crucial for creating portable applications and improving building operation and energy efficiency. Ensuring data transmutability is essential for facilitating research and overcoming the diverse data representation, management, and collection methods across various building management systems (BMSs). Different BMSs use multiple interfaces for data exchange. Some BMSs provide Application Programming Interfaces (APIs) for data exchanges, while others have gateways connecting to cloud services for application subscription and data access. This study introduces a five-layered architecture that describes how client applications, researchers, and other interested stakeholders can exchange data with different BMSs. Our objective is to help researchers and practitioners understand the various ways of accessing transmutable (capable of being transformed into a compatible format) data from BMSs, regardless of the building management system a building uses. Through transmutable access to building systems' data, we aim to enable transferable energy-efficient-related applications for buildings. We evaluate our work with a building model of the Varennes Library in Varennes, QC, Canada. The building model includes information about the building, floors, rooms, electric meter and historical time series data of the meter, weather station and its historical time series data. The model also has carbon dioxide concentration sensors, temperature sensors, humidity sensors, and historical time series data of the sensors. We include two test client programs to show how they access the transmutable data of the building through a model. We conclude that the five-layered architecture facilitates the exchange of transmutable data across diverse BMSs, making it a valuable tool for researchers and practitioners.

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