User:MRewald/Indexing

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Five-Axiom-Theory of Indexing[edit]

Robert Fugmann[1] proposed a theory of indexing, based on a system of 5 axioms.[2] Fugman was invited to present his theory at the International Classification Research Forum of the ASIS&T in 1985.[3] The paper was rewarded as Best Paper in 1986.[4]

The theory is based on the following five axioms:[3]

1. Definability
Definition of what is relevant to the inquirer in terms of concepts and concept relations.
2. Order
"Any compilation of information relevant to a topic is an order-creating process."[3]
3. Sufficient Degree of Order
The more extensive the search results are or the more frequently search queries are made, the higher are the demands on the order of the search results.
4. Representational Predictability
"The completeness of any directed search for relevant responses (and especially the recall ratio) depends on the representational predictability of the modes of expression for concepts and concept relations in the search file."
The less arbitrary and the more predictable the result of a search query is, the better its completeness[5] can be achieved.
5. Representational Fidelity
"The accuracy[6] responses (and specially the precision ratio) depends on the representational fidelity of the modes of expression with which concepts and concept relations are expressed in the search file."
The accuracy of the answers depends on the fidelity of the means of expression with which concepts and conceptual relationships are expressed in the search query.[7]


  1. ^ Robert Fugmann was vice president of the German Gesellschaft für Klassifikation (Society for classification) and became co-founder and vice-president of the International Society for Knowledge Organization (ISKO) in 1989.
  2. ^ Fugmann, Robert (August 1, 1982). "Role of Theory in Chemical Information Systems". Journal of Chemical Information and Modeling. 22 (3). American Chemical Society: 118–125. Retrieved 2020-04-27.
  3. ^ a b c Fugmann, Robert (1985). "The Five-Axiom-Theory of Indexing and Information Supply". Journal of the American Society for Information Science. 36 (2) (ASIS&T ed.). John Wiley & Sons Inc.: 116–128. ISSN 2330-1643.. The definition of terms below, are taken from the glossary in the appendix of this paper.
  4. ^ "Best JASIST Paper Award Recipients". asis&t. Retrieved 2020-04-07.
  5. ^ In the original published text Fugmann uses the term accuracy at this place but has asked to change this term later on to "completeness".
  6. ^ See also: Robert Fugmann (1985), p. 118, fig. 2, field d, right column: "Noise avoiding order: through the fulfilment of the axiom of fidelity and
    p. 123 "The accuracy of any directed search for relevant responses (and especially the precision ratio) depends on the fidelity with which concepts and concept relations are expressed in the search file."
  7. ^ See also: Robert Fugmann (1985), p. 118, fig. 2, field d, right column: "Noise avoiding order: through the fulfilment of the axiom of fidelity and
    p. 123 "The accuracy of any directed search for relevant responses (and especially the precision ratio) depends on the fidelity with which concepts and concept relations are expressed in the search file."