This Ecma Standard models IT facility equipment@ systems and components in Smart Data Centre as Resources@ organises the Resources in a graph@ and specifies the semantics ?C but not the syntax - of Messages for commands@ responses and events. This first edition covers consolidating compute and cooling resources to minimise power. Smart Clients use the Resource graph to address individual - or a group of - Resources. Smart Clients use the Messages to monitor and control the Properties of Resources. The communication protocol bindings (e.g.@ HTTP@ FTP@ SNMP@ BACnet) that transport Messages between Resources and Management Function(s) are out of the scope as illustrated in Figures 1 and 2@ in addition@ session management and security aspects such as authentication@ authorization are out of the scope. Static information such as location@ CPU models are out of scope.