Conceptual Modeling Flashcards
1
Q
Conceptual design
A
produce the initial model of the mini word
2
Q
Why conceptual modeling
A
abstraction, improved communication, adaptability
3
Q
Entities
A
a definable thing (ex. student, car, book)
4
Q
Entity set
A
a group of definable things
5
Q
Attribute
A
data tied to an entity (ex. a pet has a name), has data type
6
Q
Composite attribute
A
composed of several parts
7
Q
Key attribute
A
uniquely identifies an entity (ex. SID)
8
Q
Relationship
A
two related entities
9
Q
◻
A
entity
10
Q
▣
A
Weak Entity
11
Q
◇
A
relationship
12
Q
◈
A
identifying relationship
13
Q
⬭
A
Attribute
14
Q
⦵
A
Key Attribute
15
Q
⦾
A
Multi-valued Attribute
