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Please see the TOSCA Policy Primer page for an introduction to TOSCA policy concepts.

1 Policy Type Design

TOSCA defines a PolicyType as an artifact that "defines a type of requirement that affects or governs an application or service’s topology at  some stage of its lifecycle, but is not explicitly part of the topology itself". In the definition of a PolicyType in TOSCA, one specifies:

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In Policy Type Design, a TOSCAPolicyType artifact and its implementation (a PolicyTypeImpl) are defined.

During Model Design, a Policy Model and a Policy Model Parameter Schema is created. The Policy Model contains the definition of the policy together with its inputs and outputs, rules and logic. This model may be expressed in XACML, as Drools rules, or as an APEX model definition. The Policy Model Parameter Schema is a TOSCA definition of the parameters that a Policy Model must receive in order for it to be transformed into a policy. The schemas will ultimately be defined by the modeling team but for now are defined by the Policy Framework project.

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