11
Temporary LOBs

Use Case Model

In this chapter we discuss each operation on a Temporary LOB (such as "Determining If a Temporary LOB Is Open") in terms of a use case. Table 11-1, "Use Case Model Overview: Internal Temporary LOBs" lists all the use cases.

Graphic Summary of Use Case Model

"Use Case Model Diagram: Internal Temporary LOBs (part 1 of 2)" and "Use Case Model Diagram: Internal temporary LOBs (part 2 of 2)", show the use cases and their interrelation. For the online version of this document, use these figures to navigate to specific use cases.

Individual Use Cases

Each Internal Persistent LOB use case is described as follows:

• Use case figure. Depicts the use case. For help in understanding the use case diagrams, see Appendix A, "How to Interpret the Universal Modeling Language (UML) Diagrams".

• Purpose. The purpose of this use case with regards to LOBs.

• Usage Notes. Guidelines to assist your implementation of the LOB operation.

• Syntax. Pointers to the syntax in different programmatic environments that underlies the LOBs related activity for the use case.

• Scenario. A scenario that portrays one implementation of the use case in terms of the hypothetical multimedia application (see Appendix B, "The Multimedia Schema Used for Examples in This Manual" for detailed syntax).

• Examples. Examples, based on table Multimedia_tab described in Appendix B, "The Multimedia Schema Used for Examples in This Manual", in each programmatic environment. These can implement the use case.