Logical Data Modeling - Classifier (Label, Class, Tag) - Descriptif Attribute

About

A label is an attribute that describes its entity or relationship with nominal data.

A label is also known as:

  • a tag
  • a class
  • or just a nominal attribute
  • a classifier
  • a group
  • a category

Classifiers / Label can be organized in hierarchies.

They are the output of a classification process

In dimensional data, they are known as dimensional attribute.

Usage

They are used to label, filter and/or group on whereas additive numeric attribute are used to aggregate over.

They also create an aggregation relationship between entities.

Identifier

There is two kind of label identifier:


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