anchor.diff:  HOST: https://app.apiary.io/ngsi9
   TITLE: IoT Discovery GE Open API Specification
   DATE: 17/09/2016
  +VERSION: Release_5
  +APIARY_PROJECT: ngsi9
  +SPEC_URL: http://
  +GITHUB_SOURCE: https://github.com/UniSurreyIoT/fiware-iot-discovery-ngsi9/blob/master/doc/apiary/ngsi9-server.apib
   
   # FIWARE NGSI-9 API Core (v1)
   
  
positive.code:             ]
              }
              
  ## Convenience operation - Attribute of Individual Context Entity    [/contextEntities/{EntityID}/attributes/{attributeName}]
  
  ### Discover Context [GET]
  
  TODO
  
  + Response 200 (application/json)
  
  
negative.code:             
  # Convenience operations [/]
  
  Instances of this resource type are used for retrieving which information about a certain context entity is available. Furthermore, the availability of context information about this entity can be announced by interaction with this resource.
  
  The {entitityID} part of the resource URI must denote the ID of an individual entity. The usage of regular expressions in {entityID} is supported neither here nor for any subresource.
  
  ## Convenience operation - Individual Context Entity    [/contextEntities/{EntityID}]
  
  ### Register Context  [POST]
  
  This operation registers the availability of context information about the entity identified by the {entityID} part of the resource URI. Note that this operation can be used both for new registrations and for updates of existing registrations; in the latter case the request message should include the RegistrationId field.
  
  The request message is an instance of registerProviderRequest. The response message is an instance of registerContextResponse.
  
  + Request (application/json)
  
  