Domain Modelling

Question 1

Object-Oriented Domain Model

Answer 1

• decomposes domain into concepts or objects that represent the real world
• set of conceputal classes and fundamental actions
• iteratively completed and forms basis of software design

Question 2

What is a Conceptual classes?

Answer 2

represent ideas, things or objects in the domain

• name
• intention
• extension (contains domain elements)

Question 3

Criteria for a conceptual class

Answer 3

Must carry information not available/computable from other sources
- Avoid redundant and derived information
Specific semantics in relation to the business

Question 4

Description Classes

Answer 4

contains information that describes an entity

Question 5

When should a description class be added to the domain model

Answer 5

if

• information about an item or service is required
• deleting will result in loss of information
• redundant or duplicated information is reduced

Question 6

Conceptual Class or Attribute?

Answer 6

When we cannot save it in a primitiv data Type

Question 7

When to include associations in the domain model?

Answer 7

when the knowledge about the relation needs to be preserved for some time

Question 8

Attribute or Association (DM)

Answer 8

• attributes for primitive datatypes

- associations to model relations between conceptual classes