What Is Concept Drift and How to Measure It?
- Cite this paper as:
- Wang S., Schlobach S., Klein M. (2010) What Is Concept Drift and How to Measure It?. In: Cimiano P., Pinto H.S. (eds) Knowledge Engineering and Management by the Masses. EKAW 2010. Lecture Notes in Computer Science, vol 6317. Springer, Berlin, Heidelberg
This paper studies concept drift over time. We first define the meaning of a concept in terms of intension, extension and label. We then introduce concept drift over time and two derived notions: (in)stability over a time period and concept shift between two time points. We apply our framework in three case-studies, one from communication science, on DBPedia, and one in the legal domain. We describe ways of identifying interesting changes in the meaning of concept within given application contexts. These case-studies illustrate the feasibility of our framework in analysing concept drift in knowledge organisation schemas of varying expressiveness.
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