1. In a computing environment, a method of defining a unified management policy expression for expressing the access control policy controlling operations on resources and execution of events or workflows, the method comprising: storing access control information that defines permissions for access to resources based on one or more entities and one or more operations requested by the one or more entities; storing events or workflows that are executed in response to the one or more operations being allowed on resources by one or more entities and one or more operations requested by the one or more entities, wherein storing events or workflows comprises storing the events or workflows in a same definition as the access control information in unified management policy rules; receiving a request to execute the one or more operations on one or more objects; calculating unified management policy rules for a given request and verifying the access control information against the request, wherein verifying comprises performing a single retrieval, retrieving both the access control information and the events or workflows; and executing the workflows defined in the definition.