Classification is an naming technique for organization where entity or relationship gets classified by giving them a nominal attribute known as a classifier.
The classification of organisms in an ordered system that indicates natural relationships; The science, laws, or principles of classification; systematics; Division into ordered groups or categories.
The output of classification process is an aggregate binary relationship (ie is part of relationship).
In dimensional data, you will find this attributes in dimension.
The magical number may be applied to limit:
According to magical number, the number of value that can be choose for every class attribute should be in the range <math>7 \pm 2</math>
Example of bad class for a department
If this is the case, you should create a new level in your package (hierarchy)
According to magical number, the number of value that define a association or an entity should be in the range <math>7 \pm 2</math>
For instance, a fact table should not have more than <math>7 \pm 2</math> dimension.
Classification can be performed during data processing operations