CHAPTER 9 What are logical data models?

What does business need?Forget the technologyEnter logical

The highlighted row in Table 9.1 shows the focus of this chapter, which is the logical data model (LDM).

Relational

Dimensional

Conceptual Data Model (CDM)

‘One-pager’ on business rules

‘One-pager’ on navigation

Logical Data Model (LDM)

Detailed business solution on business rules

Detailed business solution on navigation

Physical Data Model (PDM)

Detailed technical solution

Table 9.1 The Logical Data Model is the focus of this chapter

A LDM takes the business need defined on a conceptual data model down to the next level of a business solution. That is, once you understand at a broad level the scope of an effort ...

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