、:
1.user(manager,borrower):id,password,realName,,phone
1.1.manager:borrowerDataBase,catalogAbstract,catalogConcrete
1.2.borrower:
():nickName,,,birthdate,age
():friend,group(:,/),messageDataBaseWith(Friend,Group,OtherBorrower,System),commentDataBase(book,recording,comment),(、、、)
//:,QQ、,,/,
//(//、),(、、、)
//,,
():,,,,,,,,,,
2.1.catalogItemAbstract(bookAbstract,recordingAbstract):code,title,yearOfCreation,yearOfPurchase,intoduction,available,type(),(),(),,
2.1.1.bookAbstract:author,numOfPages,publisher
2.1.2.recordingAbstract:performer,format
2.2.catalogItemConcrete:(code=catalogItemAbstract.code+01/02/03...),,
2.2.1.bookAbstract:
2.2.2.recordingAbstract:
、:
1.user:,/、、,catalogItem、catalogItem,catalogItem(、code、)
1.1.manager:、,borrowerDataBase,borrower/catalogItem,borrrower,borrower,borrower、,、borrower
1.2.borrower:/(),,,(,,),,,(、、item