This chapter examines the creation of a Digital Identity Card for built heritage, focusing on data collection, digitalization, and processing. It begins by discussing the evolution and impact of digitalization in the construction sector, emphasizing how technologies such as Building Information Modelling (BIM) and cloud-based tools enhance efficiency, collaboration, and sustainability. It then explores the definition and scope of digital heritage, highlighting its role in documenting, preserving, and interpreting historic buildings through advanced recording, management, and visualization techniques. Finally, the chapter presents methodologies for the storage, organization, and processing of heritage data, detailing the integration of diverse datasets within datalakes and structured databases to support informed decision-making in conservation and risk management.