The Information Coding Classification system developed by Ingetraut Dahlberg organizes approximately 6,500 distinct subject fields into a hierarchical structure. Born in Cologne in 1927, she spent a lifetime mapping the ontological and theoretical foundations of knowledge. Her work bridged the gap between traditional library science and the evolving requirements of modern information retrieval during the late twentieth century.
Early Development and Academic Training
Dahlberg's interest in documentation emerged during her youth, prompted by an early habit of cataloging items she deemed significant. Her formal education spanned history, philosophy, biology, English language and literature, and Catholic theology across universities in Frankfurt, Würzburg, and Düsseldorf. She also spent a year studying in the United States, providing an international perspective on classification structures. In 1973, she earned her doctorate after studying with Alwin Diemer in Düsseldorf, producing a thesis later published as Foundations for a universal organization of knowledge.
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In 1959, Dahlberg began her career at the Gmelin Institute under Erich Pietsch, focusing on nuclear power documentation. She later joined the German Documentation Society (DGD), where she managed the library and documentation center. Her tenure at the Groth Institute for Crystallographic Data Documentation in the United States further refined her approach to computer-assisted bibliographic work.
The Information Coding Classification and Scholarly Publishing
In 1977, Dahlberg unveiled the Information Coding Classification (ICC), a system structured around nine levels of being and nine facets, presented initially in Bangalore, India. Alongside her technical developments, she served as a pivotal editor and organizer within the field. In 1974, she founded the journal International Classification, which was later renamed Knowledge Organization. Her editorial efforts supported the establishment of the scientific Society for Classification and the International Society for Knowledge Organization, while her collaborative research included projects with COCTA in the social sciences.
Fast facts
- Born: 1927, Cologne
- Died: 2017, Bad König
- Nationality: German
- Doctoral advisor: Alwin Diemer
- Primary field: Information science and philosophy
- Major work: Information Coding Classification (1977)
- Founded: International Classification journal (1974)
- Professional influence: Gottlob Frege
Questions readers ask
What was the Information Coding Classification?
It was a universal classification system developed by Dahlberg that organized knowledge into approximately 6,500 subject fields using a structure based on nine levels of being.
Which organizations did Ingetraut Dahlberg establish?
She founded the Society for Classification and the International Society for Knowledge Organization, as well as the journal now titled Knowledge Organization.
