Constraints on task execution, e.g. a execution group, allowed/disallowed nodes, etc. EXPERIMENTAL.

Item Summary
Name	Type	Multiplicity	Description
$itemDefinition.Name.LocalPart	property string	[0,1]	A group this task is a part of.
$itemDefinition.Name.LocalPart	property int	[0,1]	Number of tasks within the group that can be executed at once (clusterwide).
$itemDefinition.Name.LocalPart	container TaskExecutionGroupConstraintType	[0,-1]	TODO
$itemDefinition.Name.LocalPart	property duration	[0,1]	In what time to retry after clusterwide execution constraints are not met.

Items
- $itemDefinition.Name.LocalPart
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  A group this task is a part of. In the future, task execution groups will probably have more complex parameters. But for now, their only parameter is the (clusterwide) member tasks limit. They are also referenced from NodeType when specifying execution limitations for them.
- $itemDefinition.Name.LocalPart
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Number of tasks within the group that can be executed at once (clusterwide). Default is "unlimited". This parameter will be moved into separate task group object in a later version of midPoint.
- $itemDefinition.Name.LocalPart
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  TODO
- $itemDefinition.Name.LocalPart
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  In what time to retry after clusterwide execution constraints are not met. The default is 1 minute.