ISO 12052:2017 健康情報学—ワークフローとデータ管理を含む医療におけるデジタルイメージングとコミュニケーション（DICOM） | ページ 6

3.1

attribute

property of an information object (3.10)

Note 1 to entry: An Attribute has a name and a value which are independent of any encoding scheme.

3.2

command

request to operate on information across a network

3.3

command element

encoding of a parameter of a command (3.2) which conveys this parameter's value

3.4

command stream

result of encoding a set of DICOM Command Elements (3.3) using the DICOM encoding scheme

3.5

conformance statement

formal statement that describes a specific product implementation that uses the DICOM standard

Note 1 to entry: It specifies the Service Classes (3.14) , Information Objects (3.10) , and communication protocols supported by the implementation.

3.6

data dictionary

registry of DICOM Data Elements which assigns a unique tag, a name, value characteristics, and semantics to each Data Element (3.7)

3.7

data element

unit of information as defined by a single entry in the data dictionary (3.6)

3.8

data set

exchanged information consisting of a structured set of Attributes (3.1)

Note 1 to entry: The value of each Attribute in a data set is expressed as a Data Element (3.7) .

3.9

data stream

result of encoding a Data Set (3.8) using the DICOM encoding scheme (Data Element Numbers and representations as specified by the Data Dictionary (3.6) )

3.10

information object

abstraction of a real information entity (e.g. CT Image, Structured Report, etc.) which is acted upon by one or more DICOM Commands

Note 1 to entry: Information object is also referred to in the DICOM standard as an Information Object Definition.

Note 2 to entry: This term is primarily used in DICOM PS3.1, with a few references in DICOM PS3.3. It is an informal term corresponding to a formal term that is introduced in DICOM PS3.3. In all other parts of the DICOM standard, this formal term is known as an Information Object Definition.

3.11

information object class

formal description of an Information Object (3.10) which includes a description of its purpose and the Attributes (3.1) it possess

Note 1 to entry: It does not include values for these attributes. Also referred to in the DICOM standard as a SOP Class or Service-Object Pair Class.

Note 2 to entry: This term is only used in DICOM PS3.1. It is an informal term corresponding to a formal term that is introduced in DICOM PS3.4. This formal term is known as a Service-Object Pair Class or more commonly as a SOP Class.

3.12

information object instance

representation of an occurrence of a real world entity, which includes values for the Attributes (3.1) of the Information Object Class (3.11) to which the entity belongs

Note 1 to entry: Information object instance is also referred to in the DICOM standard as a SOP Instance.

Note 2 to entry: This term is only used in DICOM PS3.1. It is an informal term corresponding to a formal term that is introduced in DICOM PS3.4. This formal term is known as a Service-Object Pair Instance or more commonly as a SOP Instance.

3.13

message

data unit of the Message Exchange Protocol exchanged between two cooperating DICOM Applications

Note 1 to entry: A Message is composed of a Command Stream (3.4) followed by an optional Data Stream (3.9) .

3.14

service class

structured description of a service which is supported by cooperating DICOM Applications using specific DICOM Commands acting on a specific class of Information Object (3.10)