Class,Attribute,Type,Default,Min,Max,Extras,Copy
Book,,,,,,,
,title,string,,0,100,,
,authors,"list of Wrote",,,,,deep
,loans,"list of Loan",,,,,none
,shelf,Shelf,,,,,shallow
,publisher,string,,0,100,,
,,,,,,,
Wrote,,,,,,,
,book,Book,,,,,deep
,author,Author,,,,,shallow
,,,,,,,
Author,,,,,,,
,name,string,,0,100,,
,wrote,"list of Wrote",,,,,
,,,,,,,
Loan,,,,,,,
,book,Book,,,,,
,borrower,string,,0,100,,
,,,,,,,
Shelf,,,,,,,
,name,string,,0,100,,
