Classification is a means to facilitate communication among actors in a field of practice.
In the construction sector classification plays a major role in specifications, structuring of documents, calculation of costs, etc. The need for general classification systems grows with the increased internationalisation of the construction market and the rapid development towards a computer integrated construction process based on computer aided product data modelling. These processes require standardised ways of describing construction artefacts, and classification is a means to achieve this. Classification within the construction sector is based on pragmatic tradition and national needs, but internationally applicable classification tables must be founded on a neutral conceptual framework. This study analyses some basic concepts within the ISO Technical Report, among others facility, space, element, and work section, and suggests further developments.