Describes the task work state: what has been processed, what is being processed and what is yet to be done. Useful for work distribution as well as for stateful suspend+resume feature.

Item Summary
Name	Type	Multiplicity	Description
bucket	container WorkBucketType	[0,-1]	Current buckets of work.
numberOfBuckets	property int	[0,1]
allWorkComplete	property boolean	[0,1]

Items
- bucket
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Current buckets of work. Some buckets might be present implicitly: if a bucket with sequence number of N is present, it is expected that all unlisted buckets with numbers lower than N are either complete (for coordinator and standalone tasks) or not relevant (for worker tasks). In a similar way, if no free bucket is available and we are not at the end it is expected that some free buckets are yet to be created (for coordinator tasks).
- numberOfBuckets
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
- allWorkComplete
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]