Currently, only a limited number of dedicated data models for infrastructural artefacts exist. To cover information exchange and interoperability requirements, a number of international initiatives have been started under the umbrella of the buildingSMART organization to extend the predominant IFC model. In this paper, we are introducing a light-weight approach that allows the flexible extension of the IFC model with RDF vocabularies and ontologies. Using real-world quay wall models from the port of Rotterdam we show how information from multiple networked data sources can be seamlessly integrated with IFC models as the main carrier of geometric representation. We demonstrate how these semantically enriched models can be used with unmodified legacy software systems to facilitate a number of interoperability scenarios throughout different lifecycle phases.
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