Categorical Set

A Categorical Set is a Finite Unordered Set (of Categorical Values).

• AKA: Finite Unordered Set, Discrete Set, Nominal Set, Nominal Scale, Categorical Value Set, Category Value Set.
• Context:
  • It can have Zero or more Categorical Values.
  • It can be:
    • the Variable Domain for a Categorical Variable.
    • the Attribute Domain for a Categorical Attribute.
  • It can be the Function Range of a Classification Function.
• Example(s):
  • a Color Set.
  • a Text Document Category.
  • a Biomolecule Type.
• See: Class, Finite Ordered Set(Ordinal Set), Infinite Ordered Set.

References

1998

• (Kohavi & Provost, 1998) => Ron Kohavi, and Foster Provost. (1998). "Glossary of Terms." In: Machine Leanring 30(2-3).
  • Categorical/Nominal: A finite number of discrete values. The type nominal denotes that there is no ordering between the values, such as last names and colors. The type ordinal denotes that there is an ordering, such as in an attribute taking on the values low, medium, or high.