Abstract
Many knowledge services have been developed as a matching platform for knowledge demanders and providers. However, most of these knowledge services have a common drawback that they cannot provide a list of experts corresponding to the knowledge demanders' need. Knowledge demanders have to post their questions in a public area and then wait patiently until corresponding knowledge providers appear. In order to facilitate knowledge demanders to acquire knowledge, this study proposes a knowledge service system based on Wikipedia to actively inform potential knowledge providers on behalf of knowledge demanders. This study also developed a knowledge activity map system used for the knowledge service system to identify Wikipedians' knowledge domains. The experimental evaluation results show that the knowledge service system is acceptable by leader users on Wikipedia, in which their domain knowledge can be identified and represented on their knowledge activity maps. © 2013 Springer-Verlag.