Traceability of attributes in BIM models for the heritage documentation

The BIM methodology, together with its associated tools, is still perceived, especially in our country, as an exception to established practice, an eternal novelty with clearly something unfinished. In Europe and worldwide, the branch of BIM, aimed at buildings without cultural connotations, has long remained in the shadows due to a lack of market interest. Only recently has this trend been reversed, particularly in Italy, thanks to tax breaks. However rigorous the process of constructing a BIM may be, it loses its value if the information on the operational steps and reliability of the collected data is not implemented in the virtualisation itself. The functional aspects of the methodology also include quality assessment, on which the possibility of reusing the model depends. In any BIM process applied to existing buildings, content validation is crucial: the geometric and semantic data must be sufficiently reliable to meet customer-specific requirements and these aspects must be adequately documented. Valid solutions emerge from the literature, but they struggle to establish themselves because they are not well integrated into the tools outlined in the technical standards. This contribution proposes a possible approach, identifying in the vast panoply of technical sector standards all those tools that can be used to quantify the reliability of information content, possibly updating them and making them compatible with current BIM regulations.