Web Database Design Session 6 and 7 Matakuliah: Web Database Tahun: 2008

2 Last Session Review:Conventional Database Design Method Requirements AnalysisData AnalysisData DesignPhysical Database Design

3 Agenda:Complication in Web Database Limitation in Web Database Method Web Database Design Method Web Data AnalysisLogical Web Data DesignPhysical Web Database Design Review session 1-7

4 Objectives: Student can understand why conventional database design is not suitable for web database application Student can understand Web Database Design Method Student can perform web database analysis and design Logical Web Data Design Student can understand Physical Web Database Design

5 Complication in Web Database The conventional database system is not sufficient to design web database due two complications: – Web Page Design, concern with: Web data representation Web data association Web interface design – Design of Connectivity between web pages and the database, concern with: Web database logical mapping Web database physical mapping

6 Limitation in Web Database Method Only design issues that relate directly to the data in the database and that are displayed in the web pages Only those web pages that are explicitly designed for the application under consideration

7 Web Database Design Method What is Web Database Design Method? – Derives a series of models that represent the data stored in the Web pages, in additional to the data in the database Major Aims for Web Database Design? – Provides systematic way of designing a data-intensive web applications

8 Web Database Design Method (cont.)

9 Web Database Design Method What is Web Database Design Method? – Derives a series of models that represent the data stored in the Web pages, in additional to the data in the database Major Aims for Web Database Design? – Provides systematic way of designing a data-intensive web applications

10 Web Database Design Method What is Web Database Design Method? – Derives a series of models that represent the data stored in the Web pages, in additional to the data in the database Major Aims for Web Database Design? – Provides systematic way of designing a data-intensive web applications

11 Web Database Design Method (cont.) Steps in Web Database Design Method? – Requirement Analysis * – Data Analysis * – Web Data Analysis – Logical Database Design * – Logical Web Data Design – Physical Database Design * – Physical Web Data Design *  has been discuss in session 4 & 5

12 Web Data Analysis What is Web Data Analysis? – Defines a conceptual model of the information that the Web pages are to represent, as well as the information that the database must represent Input for Web Data Analysis? – Description of the Organization and System Requirements – Conceptual Data Model How to do Web Data Analysis? – Web Data Extraction – Web Data Connection Output Web Database Analysis? – Extension of Conceptual Data Model: Hypermedia Link: connection between web pages Concept Box: web concept or technology that can not be describe by database

13 Web Data Analysis (cont.) Aims of Web Data Analysis: – Mapping between information presented in Web Pages and stored in Database – Check Validity of the database – Verifying the detailed design and implementation – Avoid technical complexities Why need Web Data Analysis: – There are link between pages – There are web concepts that can not be describe in Database

14 Web Data Analysis (cont.) Process of Web Data Analysis? – Web Data Extraction: Check mapping between database and web pages Check database completeness to represent in web pages – Entity attribute completeness – Entity identify completeness – Referential completeness – Web Data Connection: Analyze the web database application description in order to identify the access points into the system and the navigation paths between and within the web pages Add navigation between web pages Extension of Conceptual Data Model: – Hypermedia Link: connection between web pages – Concept box: web concept or technology that can not be describe by database

15 Web Data Analysis (cont.)

16 Web Data Analysis (cont.) Case Study Web Data Analysis Consider the following statement: “The library stocks books, identified by an ISBN. Each book has a title, one or more authors, and a publisher. There can be multiple copies of a book. A borrower can borrow up to six books at any one time, for up to three weeks. When a loan is made, the ISBN, borrower number, date of loan and return data are recorded. When a borrower registers with the library, their name, address, telephone number, sex, date of birth and the date are recorded. The web application is required to allow borrowers to search for books on the basis of author or title” Please make the Conceptual Data Model and Extension of Conceptual Data Model with Hyperlink and Concept Box.

17 Logical Web Data Design What is Logical Web Data Design? – Defines the data structure of the actual Web pages, including the links between their parts and to other Web pages Input for Logical Web Data Design? – ERD Normal – Extension Conceptual Data Model with Hyperlink and Concept Box How to do Web Data Design? – Design web pages interface (only web pages that connect to database) – Mapping ERD Normal with Interface Design Output Web Data Design? – Page Schema: data item from database that will be represent in web pages

18 Logical Web Data Design (cont.) Why need Logical Web Data Design? – Structure of unique pages – Structures common to many pages – Links – Complex data structures Rules to make Page Schema: – On the top: Page Schema name – Followed with >. > > – Repeating data items are indicated by the keyword “List Of” – Links represented by dot and anchor

19 Logical Web Data Design (cont.) Example

20 Logical Web Data Design (cont.) Case Study Logical Web Data Design Consider the following statement: “The library stocks books, identified by an ISBN. Each book has a title, one or more authors, and a publisher. There can be multiple copies of a book. A borrower can borrow up to six books at any one time, for up to three weeks. When a loan is made, the ISBN, borrower number, date of loan and return data are recorded. When a borrower registers with the library, their name, address, telephone number, sex, date of birth and the date are recorded. The web application is required to allow borrowers to search for books on the basis of author or title” Please make the Page-Schema from this case.

21 Physical Web Data Design What is Physical Web Data Design? – Designs how the Web pages are to be implemented and connected to the database system Will be discuss in details in Session 9

22 Review Session 1-7 Session 1: Introduction to Web Database Session 2: Overview Relational Database Session 3: Overview Web Session 4 & 5: Database Design Session 6 & 7: Web Database Design

23 Summary Addition step in Web Database Design: – Web Data Analysis – Logical Web Data Analysis – Physical Web Data Design

24 Next Session:Physical Database DesignPhysical Web Database DesignWeb ArchitectureClient ProcessingServer ProcessingJavaImplementation Choice

25 End of Web Database Design Thank you