Chapter 12: Problem 7

Discuss the characteristics that a data model for conceptual schema design should possess.

Short Answer

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A data model for conceptual schema design should possess characteristics like simplicity, expressive power, formal basis, usability, and intuitiveness. These features ensure that the conceptual model accurately represents the perceived world, is easily understood by all stakeholders, can effectively encapsulate identified rules and constraints, and facilitates manipulation and querying in a standardized manner.

Step by step solution

Define Data Model

A Data Model is an abstract model that organizes and defines data elements and how they relate to each other. They help to ensure that data objects provided by the functional team are accurately represented in the system.

Conceptual Schema Design

Conceptual schema design is an overview of a system's database structure independent of any physical implementation. It includes entities, the relationships between them, rules, and constraints which should hold for this model.

Characteristics of a Data Model for Conceptual Schema Design

There are several crucial characteristics a data model should have for conceptual schema design: 1. **Simplicity**: A data model should be simple so that it can be easily understood by the respective stakeholders.2. **Expressive Power**: It should be able to express all the rules identified during the requirements analysis phase.3. **Formal Basis**: The model should have a formal basis for manipulation and query formulation. This implies having standard and comprehensible notations.4. **Usability**: The model should be easily usable by users and should easily correspond to their perception.5. **Intuitiveness**: It should be intuitive and allow for mapping the perceived world into the model.

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Discuss the characteristics that a data model for conceptual schema design should possess.

Short Answer

Step by step solution

Define Data Model

Conceptual Schema Design

Characteristics of a Data Model for Conceptual Schema Design

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