1. A method comprising: receiving, at a computer system, a first policy attachment metadata file attaching a first web service policy to a policy subject at run-time; receiving, at the computer system, a second policy attachment metadata file attaching a second policy to the policy subject at design-time; determining, by the computer system, whether the first web service policy attached to the policy subject via the first policy attachment metadata file is identical to the second web service policy attached to the policy subject via the second policy attachment metadata file based on one or more predefined rules related to policy configuration properties when having the first web service policy attached to the policy subject at run-time conflicts with having the second web service policy attached to the policy subject at design-time; and generating, by the computer system, information causing the first web service policy attached via the first policy attachment metadata file or the second web service policy attached via the second policy attachment metadata file to be selectively enforced at the policy subject based on a determination that the first web service policy and the second web service policy are identical and that having the first web service policy attached to the policy subject at run-time conflicts with having the second web service policy attached to the policy subject at design-time.