anchor.diff:  
   + `timesSent` (not editable, only present in GET operations): Number of request forwardings sent due to this registration.
   + `lastForwarding` (not editable, only present in GET operations): Last forwarding timestamp in ISO8601 format.
  -+ `lastFailure` (not editable, only present in GET operations): Last failure timestamp in ISO8601 format. Not present if registration has never had a problem with forwarding.
  -+ `lastSuccess` (not editable, only present in GET operations): Timestamp in ISO8601 format for last successful request forwarding. Not present if registration has never had a successful notification.
  ++ `lastFailure` (not editable, only present in GET operations): Last failure timestamp in ISO8601 format.
  +Not present if registration has never had a problem with forwarding.
  ++ `lastSuccess` (not editable, only present in GET operations): Timestamp in ISO8601 format for last successful request forwarding.
  +Not present if registration has never had a successful notification.
   
   ## Registration list [/v2/registrations]
   
  
positive.code: ## Acknowledgements
  
  The editors would like to express their gratitude to the following people who actively
  contributed to this specification (companies listed at the time of :
  Juan José Hierro (Telefónica I+D), Marcos Reyes (Telefónica I+D), Ken Zangelin (APInf, formerly with Telefónica I+D),
  Iván Arias León (Telefónica I+D), Carlos Romero Brox (Telefónica I+D),
  Antonio José López Navarro (Telefónica I+D),  Marc Capdevielle (Orange), Gilles Privat (Orange), 
  
negative.code: 
  ### Create a new context provider registration [POST /v2/registrations]
  
  Creates a new registration. This is typically used for binding context sources
  as providers of certain data.
  The registration is represented by a JSON object as described at the beginning of this section.
  
  Response:
  