App B

Chapter B: Hierarchical Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Basic Concepts ,[object Object],[object Object],[object Object],[object Object]

Tree-Structure Diagrams ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

General Structure ,[object Object]

Tree-Structure Diagrams (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Single relationships (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Single Relationships (Cont.) ,[object Object],[object Object]

Transforming Many-To-Many Relationships ,[object Object],[object Object]

Many-To Many Relationships (Cont.)

Many-To-Many Relationships (Cont.) ,[object Object],[object Object],[object Object]

General Relationships ,[object Object]

Sample Ternary Databases. (a) T 1 (b) T 2

Several Relationships ,[object Object],[object Object]

Several Relationships (Cont.) ,[object Object]

Several Relationships (2nd Example) ,[object Object],[object Object]

Several Relationships (2nd Example) ,[object Object]

Data Retrieval Facility ,[object Object],[object Object],[object Object],[object Object]

Program Work Area ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The get Command ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The get Command (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Access Within A Database Tree ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example Queries ,[object Object],[object Object],[object Object],[object Object]

Access Within a Database Tree (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Example Query ,[object Object],[object Object]

Access Within a Database Tree (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example Query ,[object Object],[object Object],[object Object]

Update Facility ,[object Object],[object Object],[object Object]

Creation of New Records ,[object Object],[object Object],[object Object],[object Object],[object Object]

Modification of an Existing Record ,[object Object],[object Object],[object Object],[object Object],[object Object]

Deletion of a Record ,[object Object],[object Object],[object Object],[object Object],[object Object]

Virtual Records ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Virtual Records (Cont.) ,[object Object],[object Object],[object Object]

Mapping Hierarchies to Files ,[object Object],[object Object],[object Object],[object Object]

Mapping Hierarchies to Files (Cont.) ,[object Object],[object Object]

Mapping Hierarchies to Files (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The IMS Database System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Record Access Schemes ,[object Object],[object Object],[object Object],[object Object]

IMS Concurrency Control ,[object Object],[object Object],[object Object],[object Object],[object Object]

IMS Fast Path ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sample Database Corresponding to Diagram of Figure B.4

Sample Database Corresponding To Diagram of Figure B.8b

Tree-Structure Diagram With Many-To-Many Relationships

E-R Diagram and Its Corresponding Tree-Structure Diagrams

Sample Database Corresponding To Diagram of Figure B.12b

App B

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