The OntoSum project aims at developing new methods and techniques for – Ontology Learning – Ontology Coordination, Mapping and Ontology merging – Ontology-based Summarization. TheOntoSum methodology consists of the following steps – Specification of the theoretical framework – Development of methods and of a prototype system – Specification of the evaluation methodology – Exploitation and evaluation of the developed methods and system in two case studies: (a) in the context of the e-Centric EXODUS platform for document management, and (b) in biomedical applications that are being developed in DEVLAB of Dartmouth College. – Dissemination of results