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Service policies help establish constraints on the service specifications and mandate an approach. Policies can be specified around for governance, access control and other design and runtime constraints.

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Policy and contract mechanisms in a Service-Oriented Architecture (SOA) ecosystem will require the following capabilities:

• decision procedures which must be able to measure and render decisions on constraints;
• enforcement of decisions;
• measurement and notification of obligation constraints;
• auditability of decisions, enforcement, and obligation measurements;
• administration of policy and contract language artifacts;
• storage of policies and contracts;
• distribution of policies /and contracts;
• conflict resolution or elevation of conflicts in policy rules;
• delegation of policy authority to agents acting on behalf of a client;
• decision procedures capable of incorporating roles and/or attributes , attributes, or both for rendered decisions.

Capabilities related to Governance policy may be summarized as:

• Formalization of Governance Policy Models;
• Multiple use of focused policy modules employed across many common circumstances.;
• Participant accessibility to Governance Models, the governance meta-models, and related services;
• Participant accessibility to operational rules and regulations;
• Definition and Enforcement of rules and regulations;
• Definition and monitoring of Compliance.

Capabilities common to all policies may be summarized as:

• creation, deletion, edit, maintenance of policy models;
• uniquely identified, visible, accessible, policy modules with metamodels and semantic annotation to describe the terms in the policy model, its functions, and its effects;
• discovery mechanisms for searching policies;
• constraint language for expression of assertion and commitment policy constraints; , positive and negative policy constraints; , permission and obligation policy constraints;
• nesting of policy constraints allowing for abstractions and refinements of a policy constraint;
• definition of alternative policy constraints to allow for the selection of compatible policy constraints for a consumer and provider;
• composition of policies to combine one or more policies.;
• measure, enforce, render, notify, audit, administer, store, distribute, mitigate, and delegate , policy constraint decisions

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