Abstract: A system and method for enforcing policy in a computing environment with a plurality of hosts that includes establishing a policy update specified through a namespaced addressing syntax; publishing the policy update to a set of components associated with a referenced component namespace; at a host of the set of components, authenticating the policy update; at the host, locally verifying policy compliance of an operation request by the host directed towards at least a second component; applying results of verifying the policy compliance of the operation request within a communication channel flow, which comprises routing the operational request through the communication channel to the second component if the operational request is permitted and preventing the operational request if the operational request is not permitted.

Abstract: A system and method for enforcing policy in a computing environment with a plurality of hosts that includes establishing a policy update specified through a namespaced addressing syntax; publishing the policy update to a set of components associated with a referenced component namespace; at a host of the set of components, authenticating the policy update; at the host, locally verifying policy compliance of an operation request by the host directed towards at least a second component; applying results of verifying the policy compliance of the operation request within a communication channel flow, which comprises routing the operational request through the communication channel to the second component if the operational request is permitted and preventing the operational request if the operational request is not permitted.

Abstract: An ad network system for providing content quality controls to advertisers when placing display advertisements online at publishers' sites and applications is disclosed. The ad network system includes a proposal tool for creating proposals for advertising campaigns, the proposals specifying content quality controls for the campaign. An advertiser management system manages the advertising campaigns for the advertisers, and a content categorization module analyzes content at the publishers' sites and applications. The display advertisements are served to the publishers' sites and applications with a two-stage ad server system according to the content quality controls for the advertising campaigns.