Conceptualisation/Classification

Question 1

Definition

Answer 1

The process of identifying concepts

Question 2

How to classify (part of conceptualisation)

Answer 2

Definition - set of properties that need to be true for an object to be identified as that concept ; ‘student’ means that someone who is enrolled in a uni or etc…
Prototype - set of clearly perceivable properties most of the objects must have ; birds fly, penguin is an exception for example
Exemplar - collect a set of examples ; for similarities.

Question 3

What is an entity type?

Answer 3

An entity type is a concept, and therefore can be classified, whose instances can be uniquely individual identified, and exists in the domain at that time.
Is tree an entity type -> needs to have instances that are unique in order to identify the tree.
-> the instances need to be individual and identifiable.

Question 4

Relationship Type

Answer 4

Is a concept whose instances at a given time are distinct sets
- concept, so can be classified
Students enroll onto modules :
enrol : Maria, COMP107 -> is a relationship type collection
There may be temporary relationship types -> temporary on a course

Question 5

Primiteveness

Answer 5

Primitive attributes is any attribute which will be stored as data in the system

Question 6

Degree

Answer 6

Number of relationships of participating entity types.
How many entities are involved in the relationship.