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class Group { } class Item {} class Description {} association { * Group -- * Item; } association { 1 Group -> 0..1 Description; }//$?[End_of_model]$? class Item { position 127 123 109 45; } class Group { position.association Group__Item:item 65,46 30,0; position.association Description__Group 24,45 30,0; position 51 31 109 45; } class Description { position 51 229 109 45; } strictness allow 36;