Extending a plurality of manageability capabilities of manageable information technology (IT) resources utilize an “aspect of” association for describing a relationship between a first object representing a manageable resource playing a role of a subject and one or more additional objects each playing a role of an aspect. The “aspect of” association establishes an overall manageability function for the first object representing a manageable resource and the one or more additional objects as a logical composition of a plurality of manageability capabilities. The manageability capabilities are provided using distinct implementation classes for supporting a specific role, and for supporting management-discipline related aspects and behaviors needed by each of a plurality of resource management applications for managing the manageable resource. The one or more additional objects have an aspect life cycle that is bounded maximally by a subject lifecycle of the first manageable resource.