ITU‐T's Technical Reports and Specifications 829 Legend to Tables 1 and 2: Sources and indicators ISO: ISO/TC 268/SC1 IDI: ITU, ICT development index UN‐Habitat: UN‐Habitat City Prosperity Index CIC: China Institute of Communications MOHURD: China, Ministry of Housing and Urban‐Rural Development ECI: European common indicators Italy: Italy, smart city and smart statistics TTC: Sub working group for SSC of TTC in Japan GCIF: Global city indicators facility GPC: Global Protocol for Community scale GHG emissions ESCI: Emerging and sustainable cities initiative ERMC: European smart cities, European ranking of medium‐sized cities EUSI: European system of social indicators Wheel: Boyd Cohen: Index system of SSC, Smart Cities Wheel Ericsson: Ericsson, networked society city index IDC: Spain, IDC smart cities index IBM: IBM, smarter city assessment PwC: PwC, cities of opportunities index Siemens: Green city index