Compound is a type of Assemble. Assemble is related to Build. 
Record is related to Object. Object is related to Size. Size is related to Letter. Letter is related to Member. 
Compound --IsA--> Assemble <--RelatedTo--> Build 
Record <--RelatedTo--> Object <--RelatedTo--> Size <--RelatedTo--> Letter <--RelatedTo--> Member 