The objective of this contribution will be to put the premises of an organization of the durability of the practices of information in professional context. We shall try to release some key elements to begin to consider it to design the accompaniment of the durability of the practices of information in professional context. To do it, this contribution will cross a work of analysis of a corpus on the fundamental question of the durability, with a set of elements which we collected during conversations and during analyses of information systems at the architects specialized in eco-construction in Aquitaine. Indeed, the aquitains actors of the sector of the eco-constructive architecture (architects, engineers, suppliers, manufacturers...), although having asserted informative practices, organize and keep the information in a still rare, sporadic, sometimes even risky and split up way. We shall then be brought to suggest in this double pragmatic and theoretical approach, a plan of durability to facilitate the emergence then the preservation of sustainable practices of information. The question in particular of the constitution of a digital working memory, registering their informative practices around the principles of durability, stability and of transferability, will be evoked.