Knowledge acquisition is the process used to define the rules and ontologies required for a knowledge-based system. The phrase was first used in conjunction with expert systems to describe the initial tasks associated with developing an expert system, namely finding and interviewing domain experts and capturing their knowledge via rules, objects, and frame-based ontologies.

RCS methodology for knowledge acquisition and representation

Expert systems were one of the first successful applications of artificial intelligence technology to real world business problems.[1] Researchers at Stanford and other AI laboratories worked with doctors and other highly skilled experts to develop systems that could automate complex tasks such as medical diagnosis. Until this point computers had mostly been used to automate highly data intensive tasks but not for complex reasoning. Technologies such as inference engines allowed developers for the first time to tackle more complex problems.[2][3]

As expert systems scaled up from demonstration prototypes to industrial strength applications it was soon realized that the acquisition of domain expert knowledge was one of if not the most critical task in the knowledge engineering process. This knowledge acquisition process became an intense area of research on its own. One of the earlier works[4] on the topic used Batesonian theories of learning to guide the process.

One approach to knowledge acquisition investigated was to use natural language parsing and generation to facilitate knowledge acquisition. Natural language parsing could be performed on manuals and other expert documents and an initial first pass at the rules and objects could be developed automatically. Text generation was also extremely useful in generating explanations for system behavior. This greatly facilitated the development and maintenance of expert systems.[5]

A more recent approach to knowledge acquisition is a re-use based approach. Knowledge can be developed in ontologies that conform to standards such as the Web Ontology Language (OWL).[6] In this way knowledge can be standardized and shared across a broad community of knowledge workers. One example domain where this approach has been successful is bioinformatics.[7]

See also



  1. ^ Russell, Stuart; Norvig, Peter (1995). Artificial Intelligence: A Modern Approach (PDF). Simon & Schuster. pp. 22–23. ISBN 978-0-13-103805-9. Archived from the original (PDF) on 5 May 2014. Retrieved 14 June 2014.
  2. ^ Kendal, S.L.; Creen, M. (2007), An introduction to knowledge engineering, London: Springer, ISBN 978-1-84628-475-5, OCLC 70987401
  3. ^ Feigenbaum, Edward A.; McCorduck, Pamela (1983), The fifth generation (1st ed.), Reading, MA: Addison-Wesley, ISBN 978-0-201-11519-2, OCLC 9324691
  4. ^ Brule, J.F.; Blount, A.F. (1989), Knowledge Acquisition, NY: McGraw Hill, ISBN 978-0-07-008600-5, OCLC 21367222
  5. ^ Potter, Steven. "A Survey of Knowledge Acquisition from Natural Language" (PDF). Technology Maturity Assessment (TMA). Retrieved 9 July 2014.
  6. ^ Schreiber, Guus (25 September 2012). "Knowledge acquisition and the web" (PDF). International Journal of Human-Computer Studies (71). Elsevior: 206–210. Retrieved 5 March 2017.
  7. ^ Goble, Carole (2008). "State of the nation in data integration for bioinformatics". Journal of Biomedical Informatics. 41 (5): 687–693. doi:10.1016/j.jbi.2008.01.008. PMID 18358788.