The management of multi-dimensional and multi-format data for documenting cultural heritage artefacts induces new challenges, such as the development of relevant analysis and interpretation methods, the sharing and correlation of heterogeneous data among several actors and contexts, and the centralised archiving of documentation results for long-term preservation purposes. Therefore, managing heterogeneous data raises the need for a stable denominator (from a conceptual and technical point of view) for structuring data and annotations coming from a continuous process of observation and analysis carried out by multiple actors.