 The Piti Palace Documentation Project has recently completed a comprehensive and highly detailed 3D digitization process. To facilitate communication among experts from different domains, a data model was developed to map the project's results into widely adopted standards, such as city GML and indoor GML. This model allows for the efficient storage and retrieval of information about the building's architectural features, technologies, and functions. This article was authored by V. Bonora, Amusey, Akanti, and others.