104 ITU‐T's Technical Reports and Specifications Ref. No. Category Definitions/Features Key concept/ Keywords Source 94 Others Seven (7) important elements in most cases of a smart sustainable city (Source: Xi She): (i) sensible – sensor sensing the environment. (ii) connectable – networking devices bringing the sensing information to the web. (iii) accessible – the broader information of our environment is published on the web, and is accessible to the user on the web, (web). (iv) ubiquitous – the user can access information through the web, but more importantly through the use of the mobile (mobile). (v) social – the user acquires the information, and publishes it through his social network (social network). (vi) sharing – sharing is not limited to data but also to the physical object, when some objects are in free status, people can get the notification and use it. (web, mobile). (vii) visibility/augmented – to retrofit the physical environment, make the hidden information seen not only through the mobile device by individuals but also with the naked eyes in a more border range like street signs. Sensor monitoring, Internet connectivity, information availability, mobile, visible. World Smart Capital (2012)