anchor.diff:  * Channel: either `OUT`, for logs emitted on `stdout`, or `ERR`, for logs emitted on `stderr`
   * Message
   
  -Loggregator assigns the timestamp when it receives log data. The log data is opaque to Loggregator, which simply puts it in the message field of the log line. Apps or system components sending log data to Loggregator may include their own timestamps, which then appear in the message field.
  -
  -Origin codes distinguish the different log types. Origin codes from system components have three letters. The app origin code is `APP` followed by slash and a digit that indicates the app instance.
  -
  -Many frameworks write to an app log that is separate from `stdout` and `stderr`. This is not supported by Loggregator. Your app must write to `stdout` or `stderr` for its logs to be included in the Loggregator stream. Check the buildpack your app uses to determine whether it automatically ensures that your app correctly writes logs to `stdout` and `stderr` only. Some buildpacks do this, and some do not.
  +Loggregator assigns the timestamp when it receives log data. The log data is opaque to Loggregator, which only puts it
  +in the message field of the log line. Apps or system components sending log data to Loggregator may include their own
  +timestamps, which then appear in the message field.
  +
  +<%= vars.human_readable_timestamp %>
  +
  +Origin codes distinguish the different log types. Origin codes from system components have three letters. The app
  +origin code is `APP` followed by slash and a digit that indicates the app instance.
  +
  +Many frameworks write to an app log that is separate from `stdout` and `stderr`. This is not supported by Loggregator.
  +Your app must write to `stdout` or `stderr` for its logs to be included in the Loggregator stream. Check the buildpack
  +your app uses to determine whether it automatically ensures that your app correctly writes logs to `stdout` and
  +`stderr` only. Some buildpacks do this, and some do not.
   
   
   ## <a id='format'></a> Log Types and Their Messages
   
  -Different types of logs have different message formats, as shown in the examples below. The digit appended to the code indicates the instance index: 0 is the first instance, 1 is the second, and so on.
  +Different types of logs have different message formats, as shown in the examples below. The digit appended to the code
  +indicates the instance index: 0 is the first instance, 1 is the second, and so on.
   
   ### <a id='api'></a> API
   
  -Users make API calls to request changes in app state. Cloud Controller, the <%= vars.app_runtime_abbr %> component responsible for the API, logs the actions that Cloud Controller takes in response.
  +Users make API calls to request changes in app state. Cloud Controller, the <%= vars.app_runtime_abbr %> component
  +responsible for the API, logs the actions that Cloud Controller takes in response.
   
   For example:
   
  
positive.code: 2016-06-14T13:44:38.14-0700 [CELL/0]     OUT Successfully created container
  </pre>
  
  The Diego Cell also emits a CELL log message when an app instance exceeds the `max_log_lines_per_second` limit, which is configured on the platform.
  
  For example:
  
  
negative.code: 2016-11-23T16:04:01.49-0800 [RTR/0]      OUT www.example.com - [24/11/2016:00:04:01.227 +0000] "GET / HTTP/1.1" 200 0 109 "-" "curl/7.43.0" 10.0.2.150:4070 10.0.48.66:60815 x_forwarded_for:"198.51.100.120" x_forwarded_proto:"http" vcap_request_id:87f9d899-c7a4-46cd-7b76-4ec35ce9921b response_time:0.263000966 app_id:8e5d6451-b369-4423-bce8-3a7a9e479dbb app_index:0 x_b3_traceid:"2d5610bf5e0f7241" x_b3_spanid:"2d5610bf5e0f7241" x_b3_parentspanid:"-"
  </pre>
  
  For more information about Zipkin tracing,
  see [Zipkin Tracking in HTTP Headers](../../concepts/http-routing.html#zipkin-headers) in _HTTP Routing_.
  
  ### <a id='lgr'></a> LGR
  
  Loggregator emits LGR to indicate problems with the logging process. Examples include `can't reach syslog drain url`
  and `dropped log messages due to high rate`.
  
  ### <a id='app'></a> APP
  
  