The fast emergent areas of the Semantic Web and knowledge management push researchers to new efforts concerning ontology engineering. The development of ontologies must be seen as a dynamic process that in most of the cases starts with an initial rough ontology that is later revised, refined, enriched, populated and filled in with details. Ontology evolution has to be supported through the entire ontology lifecycle, resulting to a living ontology. The aim of this paper is to present the Human-Centered Ontology Engineering Methodology (HCOME) for the development and evaluation of living ontologies in the context of communities of knowledge workers. The methodology aims to empower knowledge workers to continuously manage their formal conceptualizations in their day-to-day tasks. We conjecture that this methodology can only be effectively supported by eclectic human-centered ontology management environments, such as the HCONE and SharedHCONE.
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