The more widely used classification/coding systems for building elements and components, such as CI /SfB and UDC, were developed to classify documents. A classification/coding system for use with computer aided design has to be able to convey detailed information about the features and properties of components.
Previous studies of the use of information in the construction industry, in particular the CACCI Reports, have examined the logical structure of design operations and how this influences the structure of a corresponding information system. This Thesis examines also the traditional roles of the participants in the design team and demonstrates that these roles modify the ideal structure.
A number of existing classification systems are analysed to provide, with an analysis of the theory of classification, the desirable features of a practical classification system.
The CACCI Report proposed the development of a national commodity file. In the Section on an outline of a possible classification system it is argued that the function of a national commodity file could be replaced by a three-level classification/code with responsibility for information being divided between manufacturer, trade sector organisation and the design team, responsibility for information rests with the participant-most-concerned.
Examples are provided of an individual participant's use of the proposed system and how the system would be used by several participants.
In the absence of a national system, it is suggested that the proposed system would allow teams of designers to proceed with the development of a data base for computer aided design
