Depth is related to Shallow. Shallow is the opposite of Long. Long is a synonym of Extended. 
Public is etymologically related to People. Art can be used for People. Art is related to Form. Form is the opposite of Function. 
Depth <--RelatedTo--> Shallow <--Antonym--> Long <--Synonym--> Extended 
Public --EtymologicallyRelatedTo--> People <--UsedFor-- Art <--RelatedTo--> Form <--Antonym--> Function 