7M701 1 CAD Data Structures

7M701 2 Modern System Implementation Object oriented, defining both data and functions of the object. Advantage: object class can be redeveloped without affecting the rest of the system. An object can represent concrete things, such as a building part, a window with parameters etc. Object class can be more abstract, such as a relation between a window object and a wall object. A modelling command is also implemented as an object; a modelling object call the relevant functions in the objects that take part in the modelling system.

7M701 3 Implementation in CAD systems CAD systems are developed by the CAD vendor. They allow the advanced user to adjust and expand the the system to a more specific use. In AutoCAD it is ObjectARX that gives access to add new classes on top of existing classes.

7M701 4 Data Exchange in the Building Industry What we want? A quality system to achieve cost- effective electronic data exchange: protocols to ensure uniform exchange of information section on quality assurance to provide QA techniques, especially for CAD The aim is to improve the information and communication by making agreements for exchange data about building projects between building partners.

7M701 5 Industry Foundation Classes The International Alliance for Interoperability (IAI), which set up a Chapter in the UK in 1996, is creating a system of sharing data, which saves time and is cost effective. Every object within a building, whether a wall, a door or a light switch, is given a specification as part of a global common language for developing a building project. These Industry Foundation Classes, which form the building blocks of IAI work on interoperability, are explained.The International Alliance for Interoperability

7M701 6 VGBouw standard Layers.htm

7M701 7 GB CAD- standard Realization of sructured data separation in CAD- drawings. Classification in main groups: General Architecture and Design Construction and civil engineering Urban development Mechanics Electrical engineering

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7M AutoCAD data structures: layers, object properties