anchor.diff:    Also, for registrations experiencing problems with forwarding operations, the status is set to `failed`.
     As soon as the forwarding operations start working again, the status is changed back to `active`.
   + `expires` : Registration expiration date in ISO8601 format. Permanent registrations must omit this field.
  -+ `forwardingInformation`: Information related to the forwarding operations made against the provider. Automatically provided by the implementation. 
  ++ `forwardingInformation`: Information related to the forwarding operations made against the provider.
  +Automatically provided by the implementation. 
   
   The `provider` field contains the following subfields:
  -+ `http` : It is used to convey parameters for providers which deliver information through the HTTP protocol. (Only protocol supported nowadays).
  -It must contain a subfield named `url` with the URL that serves as the endpoint that offers the providing interface. The endpooint must *not* include the protocol
  ++ `http` : It is used to convey parameters for providers which deliver information through the HTTP protocol.
  +(Only protocol supported nowadays).
  +It must contain a subfield named `url` with the URL that serves as the endpoint that offers the providing interface.
  +The endpooint must *not* include the protocol
   specific part (for instance `/v2/entities`). 
   + `legacy` : `true` if this provider only supports NGSIv1 protocol. `false` if this provider supports NGSIv2.
   Currently `true` by default. In the future, will be changed to `false`. 
  
positive.code: 
  + `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.
  
  ## Registration list [/v2/registrations]
  
  
negative.code: ## Acknowledgements
  
  The editors would like to express their gratitude to the following people who actively
  contributed to this specification:
  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), 
  