Having begun to go through the process of building an ontology, some of the main challenges of ontologies become apparent. Two such challenges relate to the design of the ontology so it is useful (to as wide a group of users as possible) and the population of the ontology (with minimal creation from scratch). It is the second of these issues that the PROPheT tool described in this module addresses.

The two following papers provide a deeper insight into these issues:

Thomas R. Gruber, Toward principles for the design of ontologies used for knowledge sharing?, International Journal of Human-Computer Studies, Volume 43, Issue 5, 1995, Pages 907-928, ISSN 1071-5819, http://dx.doi.org/10.1006/ijhc.1995.1081 (http://www.sciencedirect.com/science/article/pii/S1071581985710816)

Maedche and S. Staab, “Ontology learning for the Semantic Web,” in IEEE Intelligent Systems, vol. 16, no. 2, pp. 72-79, Mar-Apr 2001. doi: 10.1109/5254.920602 (http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=920602&isnumber=19905).