Definition of (custom) relations.

Item Summary
Name	Type	Multiplicity	Description
relation	container RelationDefinitionType	[0,-1]	Definition of a single (custom) relation.
includeDefaultRelations	property boolean	[0,1]	If set to true then default (hardcoded, statically defined) relations will be included in addition to those relations that are defined above.

Items
- relation
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Definition of a single (custom) relation.
- includeDefaultRelations
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  If set to true then default (hardcoded, statically defined) relations will be included in addition to those relations that are defined above. If set to false then only those relations that are defined above will be used in the system. EXPERIMENTAL: only partially supported