The text emphasizes the critical role of data semantics in Building Information Modeling (BIM), arguing that information (the "i" in BIM) is paramount for effective collaboration. It highlights how data dictionaries facilitate interoperability between different software and professionals by providing a shared vocabulary, ultimately improving project efficiency and enabling better analysis, especially regarding environmental impact. The text also connects BIM semantics to the European Green Deal, showcasing its importance for achieving carbon neutrality in the construction industry through standardized data classification and reporting. Finally, several resources are cited to further explore these concepts.