# Classification

## Introduction

The Classification defines a classification list system according to DIN 4000/V4001. It is a base module for the integration of neutral standard part concepts, such as the management of the standard part tables that comply with DIN 4001. Other commonly used terms for classification are Object Group Management or Group Technology Management.

Locating identical or similar parts and components is the object of classification,

- to avoid redesign, and
- to facilitate reuse with or without modification design.

A class describes a data record. It usually describes geometrical or physical properties, so-called "attributes" (a screw, for example, has the attributes "Length" and "Thread diameter"). A class can be structured; its attributes can be inherited to subclasses.

The attributes of a classification system are created and managed centrally in the attribute pool. When assigning attributes to the defined classes, these attributes can be selected from the pool.

The attributes can have so-called attribute values assigned. These can be exact values , "ranges" (maximum - minimum value) or a formula. The validity of the value specification for the corresponding attribute is verified.

Once classes have been created and attributes (and attribute values) have been assigned, concrete objects (items, documents, etc.) can be assigned to the class in the classification list.