A relationship .relationship. dir1:from_to .entity. dir2:from_to .other_entity.

Usages:

• Given a relationship .IfcRelNests. from .IfcAlignment. to .IfcAlignmentHorizontal.

  ALB000 Alignment layout - v1:14

• Given a relationship .IfcRelNests. from .IfcAlignment. to .IfcObject.

  ALB031 Alignment layouts default case - v1:16

• Given a relationship .IfcRelAggregates. from .IfcAlignment. to .IfcAlignment.

  ALB032 Alignment layouts reusing horizontal - v1:16

• Given a relationship .IfcRelNests. from .IfcAlignment. to .IfcObject.

  ALB032 Alignment layouts reusing horizontal - v1:17

• Given a relationship .IfcRelNests. from .IfcAlignment. to .IfcObject.

  ALB032 Alignment layouts reusing horizontal - v1:23

• Given a relationship .IfcRelDefinesByType. to .IfcDoor. from .IfcDoorType.

  BLT001 Correct use of operation type attributes for doors - v1:29

• Given a relationship .IfcRelDefinesByType. to .IfcWindow. from .IfcWindowType.

  BLT002 Correct use of partitioning type attributes for windows - v1:29

• Given a relationship .IfcRelAssignsToGroup. from .IfcGroup. to .IfcObject.

  GRP000 Groups - v1:10

• Given a relationship .IfcRelAggregates. to .IfcElement. from .IfcElement.

  SPS007 Spatial containment - v6:34