relations
Interfaces 
RelationValue
Classes 
Card4Relation
Card8Relation
CardEWRelation
CardNSRelation
OrienRel8Relation
Qldr2Relation
Qldr3Relation
Qldr4Relation
Qldr5Relation
QldrCentroidRelation
QldrVerticesRelation
QndrcmCentroidRelation
QndrcmRelation
QndrcmVerticesRelation
RCC5Relation
RCC8Relation