The document summarizes Jarmo Elukka Eskelinen's presentation at a conference on smart cities in Europe. It discusses how Helsinki has cultivated urban innovations by making public sector data open and available through initiatives like Helsinki Region Infoshare. This open data clearinghouse works to find, standardize, publish and utilize public data to foster innovation, efficiency and transparency among companies and communities. The presentation argues that for cities to truly be smart, public data and services must be made interoperable between different actors in the city.