Basic data structure for all policy constraints.

Item Summary
Name	Type	Multiplicity	Description
name	property string	[0,1]	Identifier of the constraint.
description	property string	[0,1]
enforcement	property PolicyConstraintEnforcementType	[0,1]

Items
- name
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Identifier of the constraint. It is used when midPoint needs to refer to a specific constraint, e.g. in order to record exception. This element is formally specified as optional, mostly due to the compatibility reasons. But it has to be provided in order for some functionality to work correctlry.
- description
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
- enforcement
  
  Flags: RAM,runtime,AVals:3
  
  Multiplicity: [0,1]