Aiming to contribute to the theoretical-methodological framework of terminography, this article focuses on some organizational principles adopted by the working team of the TERMISUL project while editing the Dictionary of Environmental Law (1998). Special emphasis is given to the criteria used in term identification, treatment of definitions and foreign language equivalence, as well as to the structuring of both the paper and the electronic versions. The problems met are closely related to the way in which terminological issues should be construed in a developing multidisciplinary domain such as environmental law.