Abstract : The ICOMOS Documentation Centre has carried out a survey among professionals in the field of conservation of historic monuments and sites, in order to know their needs and practices in terms of scientific and academic research and the subsequent dissemination of their works. In this report we explain the results of this study, which reveal some general tendencies in the behavior of the heritage professionals. The report also presents a first approach to open access and the ICOMOS project to set up a repository of this kind. This will take the form of an institutional open archive where all the scientific documentation produced by ICOMOS will be deposited and centralised. It will also serve as a subject archive open to the rest of the international scientific community in the field of cultural heritage conservation.