The document discusses the SEMANCO platform for visualizing and analyzing energy-related data, detailing the types of tools integrated, such as embedded, interfaced, and external tools, and their varying data requirements. It emphasizes the integration of diverse data sources and visualization at both building and district levels, facilitated by a shared semantic framework. The workshop, held in Barcelona in April 2013, aims to showcase methods for reducing CO2 emissions and improving energy performance through technology and data integration.