anchor.diff:  
   + Response 200 (application/json)
       + Attributes
  -        + subscriptionId: `52415800-8b69-11e0-9b19-734f6f006e54` - It is the key that represents the id of the subscription, following the OpenStack Id format. 
  +        + subscriptionId: `52415800-8b69-11e0-9b19-734f6f006e54` (required, string) - It is the key that represents the identifier of the subscription, following the OpenStack Id format. 
   
       + Body
   
  
positive.code: 
  ## Status
  
  Final version aligned with FIWARE Release 4.4.
  This specification is the September 2016 release candidate of the PMI API specification 
  corresponding to Release 5.4 of FIWARE. By "release candidate" we mean that only Minor 
  Changes are expected to the API described by this document. In particular, Minor Changes 
  
negative.code: * A **rule** represents the policy or rule that will be used to infers new facts or 
  actions based on the facts notified by the Publish/Subscribe Context Broker GE. Usually, 
  rules are compound of conditions and actions
  * A **condition** is some type of conditional statement of the form: x > 85% [AND y > 64.5%]. 
  Several conditions can be connected using AND logical operator.
  * A **fact** represents the measurement of the cloud resources and will be used to 
  infer new facts or actions. It is the base of the reasoning process.
  * An **action** represents the triggered message inferred by the rule engine based on 
  the execution of certain conditions defined in a rule or rules set. This message is 
  