This paper want to present the philosophy behind the open digital archaeological archive of Mappaproject Pisa (MAPPAopenData). The Archive will contain the digital archaeographic data (raw data or primary data) produced by the archaeologists in Pisa. Gathering the digital archaeographic data in a single location that may be freely accessed via the web means preserving this data. Publishing, disseminating and allowing data to be copied means increasing the chances of preserving the data. It is also important to share them within a short time limit: data grow old and it is better to make them immediately available when the scientific community is more methodologically in tune with whoever has produced the data. A further level of innovation consists in making the academic archaeological community accept such a revolutionary instrument. The innovative path that intends being taken is to consider archaeography (whether associated to research structures or professionals working in this sector) always and in any case a research activity since it produces unique and unrepeatable data. Consequently sharing the raw data will be considered a scientific publication, through the use of specific copyright/copyleft licences. The open digital archive goes hand in hand with data publication and the protection of the individuals who have collected the data. Finally, sharing means being able to analyse the data and generate new archaeological interpretations, allowing research to grow with a collaborative approach. The open digital archive intends delivering bottom-up initiatives that will involve the entire archaeological community, forcing it to change habits and to impose necessary standards. In other words, therefore, the project will lead to a real progress in the diffusion of data and democratisation of research.