Organizations have i ncreasingly k nowledge-intensive business processes that require a wealth of electronic resources which are scattered across a number of systems but are implicitly linked to each other. Meta-data annotations to these electronic resources can support users in retrieving related documents which is a key to provide advanced knowledge services in an enterprise knowledge infrastructure. The improved retrieval of documents ultimately aims at increasing productivity of knowledge

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... rk,. This paper discusses all necessary standards, languages and tools required to create, store and retrieve meta-data from the perspective of an enterprise knowledge infrastructure which should provide all means to do this within its integration layer.