The quality of legislative drafting process at European and national levels is highly influenced by the legal drafters control over the multilingual complexity of European legislation and over the linguistic and conceptual issues involved in its transposition into national laws. The DALOS project aims at ensuring coherence and alignment in the legislative language, providing law-makers with a knowledge (ontological-linguistic) resource and knowledge management tools to support the multilingual legislative drafting process. This paper outlines the activities within DALOS, aiming at the definition of the characteristics of a the knowledge resource, at its implementation, at its integration in a legislative drafting environment for the project prototype.