## 4 Discussion and Conclusions
By tracking energy consumption and performance, the digital building logbook assists in planning energy-efficient upgrades, which are often a key focus in renovation projects. The studies also reveal the correlation between the digital building logbook and sustainability. In fact, some articles analyze so-called material passports, which are elements that could be integrated within the digital building logbook, providing information about building materials and enabling better decision making regarding resource allocation, material selection, and renovation strategies. Data are the keywords when the building logbook is cited. When managing the building, issues occur such as there being a great amount of and variety of data. Therefore, a lot of information needs to be managed. In addition, many building operations data are not updated, incomplete, and in low interoperable formats. Therefore, issues related to data accessibility and gathering can emerge. The data needed to be collected within this tool are various, from energy performance certificates to building envelope and administrative information. Data source accessibility depends on the national context as well. In fact, some data are partially open, while others are non-protected; additionally, others are fully protected and available only to the property owners. Furthermore, poor-quality and varied data are gathered as a result of the absence of universal principles and techniques. For instance, some sources gather data at the building scale, whereas others utilize the residence or building scale. In conclusion, a digital building logbook, as a common repository for building information, will facilitate data transparency for a variety of stakeholders involved in the construction process since data in a paper-based format, out-of-date as-built data, and the lack of understanding on building components and systems make the selection of the best refurbishment alternatives challenging. This can include a group of informative attributes of and documents for a building that have to be collected during its lifecycle and that can be linked to BIM, tracking changes, and updates. Static data as well as real-time data obtained from Internet of Things devices can be incorporated; data integration will contribute to the regular updates of buildings. It is particularly useful in cases in which project documentation is outdated or unavailable. The digital building logbook is conceived to obtain information not only for facility managers but also for owners, clients, and occupants, allowing for better decision making in maintenance, renovation, and reconstruction projects by offering critical building data, as well as assessments of energy performance and life cycle costs. Although this research contributes to the knowledge of the digital building logbook by highlighting the relevant publications through a systematic literature review approach, the use of only two databases--Scopus and Web of Science--may have led to the omission of important publications related to the factors influencing the adoption of digital building logbooks in the construction sector. As a result, the research findings may not fully represent the entirety of the existing literature on the drivers of digital building logbook implementation. Additionally, while the key publications were meticulously chosen, the literature search might not have encompassed all relevant keywords. Future studies will examine the application of this tool on a real case study to test its effectiveness. In addition, how this information can be utilized and shared, focusing on the concept of interoperability, will be analyzed. In fact, even with a tool like the digital building logbook, which gathers building-related data, it is important to explore potential strategiesfor exchanging various types of information. Furthermore, it is necessary to investigate the flow of information between different digital building logbook users, understanding who provides what type of data and how the data are exchanged.