Diagrams Entity Dictionary

In this chapter, we present a way of caching the Entity Dictionary—the lookup data. Figure 13.1 is the class diagram of the Entity Dictionary framework. 

Figure 13.1 The class diagram of the Entity Dictionary, public class EntityDictionaryDao ...

During the analysis phase of the SDLC, data are represented in the DFDs in the form of data flows and data stores. The data flows and data stores are depicted as DFD components in a processing context that will enable the system to do what is required. To produce a system, however, it is necessary to focus on the data, independent of the processes. Conceptual data modeling is used to examine the data at rest in the DFD to provide more precise knowledge about the data, such as definitions, structure, and relationships within the data. Withoirt this knowledge, httle is actually known about how the system will have to manipulate the data in the processes. Two conceptual data modeling tools are commonly used entity relationship diagrams (ERDs), and data dictionaries (DDs). Each of these tools provides critical information to the development effort. ERDs and DDs also provide important documentation of the system. 

Information systems (IS) (Continued) data dictionaries, I02-I03 data flow diagrams, 99-101 entity relationship diagrams, 102, 103 feasibility analysis, 98-99 Gantt charts, 103-104 joint application deployment, 105 PERT diagrams, 104 rapid application deployment, 104, 105 Structured English, use of, 100-102 transorganizational, 69-70 as element of electronic commerce, 69-70 and types of knowledge, 67 value of, 67... 

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