Model View Definition
The model view definitions (MVDs) define the subsets of the IFC data model that are necessary to support the specific data exchange requirements in construction during a construction project.
The model view definition provides guidance for all IFC expressions (classes, attributes, relationships, property sets, set definitions, etc.) that are used and must exist in a particular scope. MVDs always refer to a specific IFC version (eg IFC2x3, IFC4 or IFC5).
MVD is both a file format (* .mvdxml, the file for data exchange in XML format) and an information model (schema for structuring MVD files as an XML schema definition).
The model view definition also describes the specifications for the implementation of the IFC interface in a specific software.
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