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It seems that all the chain of platform components (policy-handler, deployment-handler, policy-plugin, onap-dcae-dcaepolicy-lib) in DCAE-Controller will have to be heavily changed to accommodate the new node types and use the new PDP API along with the old PDP API. 

Besides, each service component will have to be changed as well to consume the new policy structures.

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Open issues

1. It is not clear on whether and how the web-socket API is changing
   1. the web-socket API contains the policyName, policyVersion, as well as the matchingConditions used for matching to the policy-filters
   2. it is not clear how the policy-update notification can be matched to the new PDP API

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