anchor.diff:  |===
   |Name|Type|Required|Description
   |`id`|String|Yes|The identifier string for the workflow, must be unique.
  -|`trigger`|link:#triggers[Trigger]|Yes|The trigger that determines data availability for the workflow.
  -|`schedule`|link:#schedules[Schedule]|Yes|The schedule that determines the points in time at which the workflow should run.
  +|`trigger`|<<Triggers Reference,Trigger>>|Yes|The trigger that determines data availability for the workflow.
  +|`schedule`|<<Schedules Reference,Schedule>>|Yes|The schedule that determines the points in time at which the workflow should run.
   |`schedulingStrategy`|link:#scheduling-strategies[SchedulingStrategy]|Yes|The scheduling strategy that determines when and in which order ready slots should be run.
   |`externalService`|link:#external-services[ExternalService]|Yes|The external service actually responsible for executing the job.
   |`startTime`|String|No|The date when the workflow should start executing (default: "1970-01-01T00:00Z").
  
positive.code: 
  The `externalID` field contains the Oozie ID of the corresponding
  Oozie workflow execution if the slot is running, successful, or failed
  (otherwise `externalID` is null).
  
  The `retryCount` records how many times the slot has already been
  retried after failure.
  
negative.code: ....
  
  Rerunning thus serves two purposes: besides the main use of rerunning
  a slot, it can also be used to _backfill_ data, by rerunning those
  slots outside the sliding window that the scheduler should care about.
  
  ==== Further Directories
  
  Celos has a *defaults directory* that contains JavaScript files that
  can be imported into a workflow JavaScript file with
  <<celos.importDefaults>>.  Such defaults files are used for sharing
  global variables and utility functions.
  
  Celos writes daily-rotating logs to a *logs directory*.
  
  All directories (workflows, defaults, logs, and database) are
  configurable via <<Server Command-Line Arguments>>.
  
  === Continuous Delivery of Workflows
  
  