Construction processes rely on information communicated between the actors. In order to be able to automatically process such information, it must be mapped as data. To exchange information in building practice, therefore, standardized or otherwise established data formats are used. For the flexible support of project-related communication – as it is particularly pronounced in construction – it is important not to restrict the choice of data formats. The representable information of a single data model is limited on principle. Usually it refers to a specific domain such as scheduling or bidding. Instances of these data models – so called construction domain models – can then be processed with associated specialized applications.