3 Definitions

3.1 Reference Model Definitions

This part of the Standard is based on the concepts developed in ISO 7498-1 and makes use of the following terms defined in it:

a) application entity

b) application layer

c) application process

d) data link layer

e) layer entity

f) network layer

g) physical layer

h) presentation layer

i) presentation service

j) protocol or layer protocol

k) protocol data unit or layer protocol data unit

l) service or layer service

m) service access point

n) session layer

o) transfer syntax

p) transport layer

q) transport protocol

r) transport connection

3.2 Naming and Addressing Definitions

This part of the Standard makes use of the following terms defined in ISO 7498-3:

a) calling presentation address

b) called presentation address

c) responding presentation address

d) called application entity title

e) calling application entity title

3.3 Service Conventions Definitions

This part of the Standard makes use of the following terms defined in ISO/TR 8509:

a) service provider

b) service user

c) confirmed service

d) non-confirmed service

e) primitive

f) request (primitive)

g) indication (primitive)

h) response (primitive)

i) confirmation (primitive)

3.4 Presentation Service Definitions

This part of the Standard makes use of the following terms defined in ISO 8822:

a) abstract syntax

b) abstract syntax name

c) presentation context

d) presentation data values

e) transfer syntax

f) transfer syntax name

3.5 ACSE Service Definitions

This part of the Standard makes use of the following terms defined in ISO 8649:

a) association or application association

b) application context

c) association control service element

d) association initiator

3.6 DICOM Introduction and Overview Definition

a) message

3.7 DICOM Communication Support Definitions

The following definitions are commonly used in this part of the Standard:

Unique identifier (UID): The scheme used to provide global unique identification for objects. It uses the structure defined by ISO 8824 for OSI Object Identifiers.

DICOM upper layer: The Upper Layer protocols are related to the Session, Presentation and part of the Application Layer of the ISO reference model. These protocols provide the Upper Layer Service. This Service is a proper subset of the ACSE Service and OSI Presentation Layer Service.