Many instances ands circumstances might warrant using the postal code finder Canada services. One might want to look up the postal code of a friend, family or for a business when they have mail and they do not know its origin.
J. Lehmann, J. Schüppel, und S. Auer. Proceedings of the 1st Conference on Social Semantic Web (CSSW 2007), Volume 113 von LNI, Seite 99-110. GI, (2007)