Abstract
Core domains to establish digital twins of the built environment are Building Information Modeling (BIM), Geographic Information System (GIS) and Internet of Things (IoT). RESTful Application Programming Interfaces (APIs) of these domains allow easy access to the digital twin. While multiple information models are reasonable since the focus of these domains is distinct, interoperability becomes a challenge. Therefore, in this paper we propose a hypermedia-driven RESTful API for digital twins of the built environment. While the GIS and IoT interfaces are covered by established standards, we define a RESTful interface for Industry Foundation Classes (IFC) models of the BIM domain. The APIs are interconnected with a federated approach though hypermedia navigation links. An evaluation by two use cases – a planning model and a structural health monitoring application – shows that the API can be used to navigate through the models crossing seamlessly the scope of the domains and overcoming barriers of interoperability.
Published Version
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