Question

1. What are the main steps of the noun technique?

2. What is an attribute, an identifier or key, and a compound attribute?

3. What is multiplicity, and what is the other term used by traditional analysts and database analysts?

4. What are some examples of multiplicity constraints?

Answer 1

Main steps of Noun Technique:

Using the use cases, actors and other information about the system including inputs and outputs.

Using other information from existing systems, current procedures, and current reports or forms, add items or categories of information needed.

Attribute: An attribute is a descriptive piece of information about things or objects.

Identifier: An identifier or key is an attribute the value of which uniquely identifies an individual thing or object. 

Compound Attribute: A compound attribute is an attribute that consists of multiple pieces of information but is best treated in the aggregate.

Multiplicity: Multiplicity, in UML, is a measure of the number of links in a particular association between a thing (object) and one or more other things (objects). Database analysts use the term “cardinality.”
•The minimum multiplicity is 0.
•The maximum multiplicity is 1.
•An order can only be placed by 1 customer and a customer can only have 1 account.

Multiplicity Constraints: The Multiplicity is the constraint on the collection of the association objects.

The multiplicities include the following constraints: optional (0), one (1), lower-bound (n), upper-bound (m), and many without bounds (*). For example, a one-to-many multiplicity would be 1 -- *.