| 15 | | * Person (**__id_person__**, **name**,** surname**, address, town, **phone_num**) |
| 16 | | * Employee (**__id_person__***(Person), **id_library***(Library), **position**) |
| 17 | | * Member (**__id_person__***(Person), **id_school***(SchoolType), **id_membership***(MembershipType), **id_library ***(Library), **birth**, **email**, **pass**) |
| 18 | | * Library (**__id_library__**, **name**, **city**) |
| 19 | | * SchoolType (**__id_school__**,** school_type_name**) |
| 20 | | * MembershipType (**__id_membership__**, **mem_stype_name**) |
| 21 | | * PriceList (**__id_price__**, **id_membership***(MemberShipType), **price**) |
| 22 | | * Genre (**__id_genre__**, **name**) |
| 23 | | * Writer (**__id_writer__**, ** name**) |
| 24 | | * Review (**__id_review__**, **id_book***(Book), **rate**, **rent_num**) |
| 25 | | * Room (**__id_room__**, **id_library***(Library), **places**, **free_places**) |
| 26 | | * OnlineDownload (**__id_onlineDown__**, **id_book***(Book), **id_person_member***(Member)), |
| 27 | | * ReservationBook (**__id_resBook__**, **id_book***(Book), **is_person_member***(Member), **take_date**, **return_date**) |
| 28 | | * Book (**__id_book__**, **id_writer***(Writer), **id_library***(Library), **name**, **book_num**, **if_free**, **book_price**, **book_price_late**) |
| 29 | | * ReservationPlace (**__id_resRoom__**, **id_room***(Room),** id_person_member***(Member),** date**, **duration**) |
| | 15 | * Person(**__id_person__**, **name**,** surname**, address, town, **phone_num**) |
| | 16 | * Employee(**__id_person__***(Person), **id_library***(Library), **position**) |
| | 17 | * Member(**__id_person__***(Person), **id_school***(SchoolType), **id_membership***(MembershipType), **id_library ***(Library), **birth**, **email**, **pass**) |
| | 18 | * Library(**__id_library__**, **name**, **city**) |
| | 19 | * SchoolType(**__id_school__**,** school_type_name**) |
| | 20 | * MembershipType(**__id_membership__**, **mem_stype_name**) |
| | 21 | * PriceList(**__id_price__**, **id_membership***(MemberShipType), **price**) |
| | 22 | * Genre(**__id_genre__**, **name**) |
| | 23 | * Writer(**__id_writer__**, ** name**) |
| | 24 | * Review(**__id_review__**, **id_book***(Book), **rate**, **rent_num**) |
| | 25 | * Room(**__id_room__**, **id_library***(Library), **places**, **free_places**) |
| | 26 | * OnlineDownload(**__id_onlineDown__**, **id_book***(Book), **id_person_member***(Member)), |
| | 27 | * ReservationBook(**__id_resBook__**, **id_book***(Book), **is_person_member***(Member), **take_date**, **return_date**) |
| | 28 | * Book(**__id_book__**, **id_writer***(Writer), **id_library***(Library), **name**, **book_num**, **if_free**, **book_price**, **book_price_late**) |
| | 29 | * ReservationPlace(**__id_resRoom__**, **id_room***(Room),** id_person_member***(Member),** date**, **duration**) |
