"We know more than we can tell and we can know nothing without relying upon those things which we may not be able to tell" (Michael Polanyi) The importance of knowledge management (KM) is increasingly recognized in the public sector and in relation with e-government implementations. Because governments and public administrations deal with information and knowledge on a large scale, this domain is particularly predestined to actively practice KM: much of the work of public authorities refers to the elaboration of data, infor- tionandknowledgeoncitizens,businesses,society,themarkets,theenvironment, laws, politics, etc. Evenmany"products"ofpublicadministrationandgovernmentaredelivered intheshapeofinformationandknowledgethemselves. Thisaspectespecially- plies to the policies, management, regulation and monitoring of society, markets and the environment. With the recent evolution of e-government projects, high expectations are linked. As a consequence, e?cient support from adequate KM conceptsandtoolstoexploitthehugeknowledgeandinformationresourcesdealt with in e-government is expected. Not