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Entity > Abstract > Attribute > DirectionAttribute
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DirectionAttribute comparison table
Subject documentation have contraryProperty
EastThe compass direction of East 
HorizontalAttribute used to indicate that an Object is positioned width-wise with respect to another ObjectVertical
NorthThe compass direction of North 
SouthThe compass direction of South 
VerticalAttribute used to indicate that an Object is positioned height-wise with respect to another Object 
WestThe compass direction of West 

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