This presentation illustrates several contributions towards improving urban data standards and ameliorating urban data interoperability. The work presented was realized as a part of the Ph.D. Thesis of Diego Vinasco-Alvarez, intitled “Modeldriven Integration of Heterogeneous n-Dimensional Urban Data” (VINASCO-ALVAREZ, D 2023) within the LIRIS laboratory VCity project. In particular, we present our research towards producing a "computationally friendly" and machine-readable representation of the CityGML conceptual model, a data model for representing 3D semantic urban data.