1. 1 Pertemuan 26 Object Relational Database Management System (Lanjutan) Matakuliah: M0174/OBJECT ORIENTED DATABASE Tahun: 2005 Versi: 1/0

2. 2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Mahasiswa dapat Menghasilkan rancangan database objek (C3)

3. 3 Outline Materi Semantic databases Deductive databases Temporal databases Multidatabases

4. 4 Semantic databases In the database context, data semantics refers to the real world meaning of the data Example

5. 5 Semantic databases CUSTOMER PLACED SALES_ORDER TRADE_ CUSTOMER RETAIL_ CUSTOMER

6. 6 Deductive databases The rows of the tables in a relational database represent facts about the world within which the database system operates Example

7. 7 Deductive databases Both facts and rules are represented by logical formulae, know as horn clauses A horn clauses is constructed from : –Constant –Variables –Predicates

8. 8 Temporal databases Entity Time Attributes

9. 9 Multidatabases These are two motivations for distributing databases systems: –To provide wider access to data via communications networks –To place data where it is used when it is economical to do so

10. 10 Multidatabases Type of multidatabases systems –Distributed –Federated database

11. 11 SUMMARY Object Relational Database Management System include –Semantic databases –Deductive databases –Temporal databases –Multidatabases