ITU‐T's Technical Reports and Specifications 155 Dimension label Dimension Sub‐dimension label Sub‐dimension D4 Quality of life D4.1 Education D4.2 Health D4.3 Safety/security public place D5 Equity and social inclusion D5.3 Openness and public participation D5.4 Governance D6 Physical infrastructure D6.1 Infrastructure/connection to services – piped water D6.2 Infrastructure/ connection to services – sewage D6.3 Infrastructure/ connection to services – electricity D6.8 Infrastructure/connection to services – road infrastructure D6.11 Building Source: ITU‐T FG‐SSC (2014)12 The corresponding indicators for each sub‐dimension are detailed in the \"Technical Specifications on key performance indicators related to the use of information and communication technology in smart sustainable cities\" and \"Technical Specifications on key performance indicators related to the sustainability impacts of information and communication technology in smart sustainable cities\". c) Setting the framework for ICT architecture of smart sustainable cities The architecture of smart sustainable cities has been defined in the corresponding FG‐SSC Technical Specification on “Setting the framework for an ICT architecture of a smart sustainable city” (fg‐ssc‐0345), At a high level, a Meta‐Architecture consists of 5 layers (as depicted in Figure 3), which focus on the integration between natural environment and soft infrastructure of urban spaces, while SSC services run across these layers. ____________________ 12 ITU FG‐SSC (2014), Technical report on \"Key performance indicators definitions for smart sustainable cities\".