The framework requires that infrastructure development is seen from a holistic perspective in terms of these interdependencies and that planning horizons are longer term, accounting for the full lifespan of the system and of the individual assets. Relational databases that enable us to structure and analyze data have been part of mainstream product offerings since the mid to late 1970s. Spatial databases to represent objects defined in geometric space are common today, as are geospatial systems that enable us to work with detailed geographical information.