Mapping: Conceptual model Logical model (using the relational model)

Map the entity and relationship types shown in the ER diagrams (in UML notation) below to relations (3NF). Materials: Appendix D (Design Methodology for Relational Databases). Terms: entity type, strong and weak entity types, relationship type, attribute, attribute domain, primary key, alternative key, simple attribute, composite attribute, multi-valued attribute, derived attribute, multiplicity constraints (cardinality and participation), normalization 1NF, 2NF, 3NF.

Employment Contract Employee Holds empNo (PK) contractNo (PK) position startDate endDate salary name firstName lastName address Employee Project empNo (PK) name address o.. projectNo (PK) pName (AK description hours Vehicle Check 0date (PPK) faults 11..5) regNo (PK) make model /totalFaults ---sDate Supervises Employee empNo (PK) name address