Margin is a type of Boundary. Margin is a synonym of Border. Border is related to National. 
Soft is related to Carpet. you are likely to find Floor in/at/on Carpet. you are likely to find Table in/at/on Floor. 
Boundary <--IsA-- Margin <--Synonym--> Border <--RelatedTo--> National 
Soft <--RelatedTo--> Carpet <--AtLocation-- Floor <--AtLocation-- Table 