The paper describes the Jur-Wordnet (Jur-IWN) project, whose objective is an ontology-based extension to the legal domain of the Italian version of EuroWordNet. It aims at providing both a content description model for legal information and a resource for accessing multilingual and heterogeneous information sources. Jur-IWN involves a double interpretation of the model, and of its features. Conceived as a lexical resource, terms are linked to each other throughout lexical relation, while, as a content description model, the concepts are organised according to stronger assumptions about the ontological nature of entities that populate the legal domain, and about their relationship. The crucial problem is to save the global consistency of the model: the lexical view needs a clear definition of the boundaries between common language and technical legal terminology, while the conceptualisation of the core entities needs to be linked in a coherent way to upper level categories. The upper-l...