Modelle dienen einem Zweck: Anmerkungen zu standardisierten Formaten für digitale Bauwerksmodelle

摘要

Building Information Modeling (BIM) is the term in the building economy which describes at present time the use of digital models. BIM has a close relation to the standardized Industry Foundation Classes (IFC). Software companies support IFC; and data are available beyond the scope of a specific software product. This paper scrutinizes the concept of IFC. buildingSMART International supports IFC; but they also offer the buildingSMART Data Dictionary (bSDD). This paper discusses the need to precise the definition of the purpose of data transfer. The goal is data transfer without loss of data for the chosen purpose. The diversity of the building economy as well as changing requirements of the users must be considered and supported. The standard itself must be stable without the need of changes, adaptions and additions. To achieve these goals, the concept of bSDD and its data model should be an integral part of modeling semantics. Semantics and geometry should be more separated. Geometric data models need extensions. Pilot implementations substantiate the theses presented in this paper. Standardized digital models for buildings and their parts are in the focus of this paper.