Ontologies are used actively as a knowledge representation, retrieval and navigation tool to improve knowledge sharing, exchange and communication. In order to provide effective communication ontologies should be mapped with the context. This paper analyses existing approaches towards the very definition of context and suggests two context types. Requirements for effective knowledge representation based on two context types and on mapping ontologies and context are suggested. These requirements are considered and factored in the following case study by consecutive mapping different context types and content ontology. This case study describes Knowledge Navigator - a map that relates contents of Formalized Management methodology with the corresponding context in order to reach effective knowledge communication to end users.