3 Definitions
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# 3 Definitions

For the purposes of this standard, the following definitions apply.

## 3.1 DICOM Introduction and Overview Definition

This part of the standard makes use of the following term defined in PS3.1:

Attribute

  See PS3.1.

## 3.2 DICOM Information Object Definition

This part of the standard makes use of the following term defined in PS3.3:

Attribute Tag

  See PS3.3.

## 3.3 DICOM Data Structures and Encoding Definitions

This part of the standard makes use of the following terms defined in PS3.5:

Data Element

  See PS3.5.

Data Element Tag

  See PS3.5.

Element Number

  See PS3.5.

Group Number

  See PS3.5.

Repeating Group

  See PS3.5.

Retired Data Element

  See PS3.5.

Standard Data Element

  See PS3.5.

Value Multiplicity (VM)

  See PS3.5.

Value Representation (VR)

  See PS3.5.

## 3.4 DICOM Data Dictionary

The following definition is commonly used in this Standard:

Tag

  A unique identifier for an element of information composed of an ordered pair of numbers (a Group Number followed by an Element Number), which is used to identify Attributes and corresponding Data Elements.

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