Abstract
Technology classifications are required for structur mg data on technological innovation for information storage and retrieval and to provide frameworks for the analysis of technological change This paper renews different types of principles used in technology classification and their embodi ment in vaneties of classification schemes. The principles considered are classification according to historical develop ment; natural laws; branch of production: function within branch of production; or by construction principle. The paper briefly discusses four types of classification: bibliographic: patent: product, and analytical. It explores the extent to which such principles and practice deal with technology in terms of ideas and frameworks rooted in the objective or internal structure of technology or the extent to which they rely on "extra-technological" concepts and frameworks. A cunceptual framework is proposed which expresses the tension between approaches which rely on extra-technological principles and approaches based on some notion of the objective or mternal structure of technology. This takes the form of a contrast between "linguistic" and "taxonomic" paradigms.
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