Data-centered modularity

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Introduction to Object-oriented Programming - slide 9 : 22

Data-centered modularity

Modularity is the property of a computer program that measures the extent to which it has been composed out of separate parts called modules [Wikipedia]

Procedural modularity
- Made up of individual procedures or functions
- Relatively fine grained
- Not sufficient for programming in the large
Boxing modularity
- A wall around arbitrary definitions
- As coarse grained as needed
- Visibility may be controlled - import and export
Data-centered modularity
- A module built around data that represents a single concept
- High degree of cohesion
- Visibility may be controlled
- The module may act as a datatype

Object-oriented programming is based on data-centered modularity