ISO/IEC 22534:2005

Information technology — Telecommunications and information exchange between systems — Application session services

The services defined in ISO/IEC 22534:2005 are used to establish and maintain a relationship between an application and a server for the purpose of exchanging application messages. For the purpose of ISO/IEC 22534:2005, this relationship is called an application session. Application protocols, such as ECMA-323, require that an application session is established before application messages are exchanged. ECMA-269 specifies several mechanisms for establishing an application context. One possible mechanism is ACSE (ISO/IEC 8649) - but since ASCE uses ASN.1 encoding for its services, it is not desirable for use with XML based protocols such as ECMA-323. ISO/IEC 22534:2005 provides an XML-based alternative for establishing application sessions.

Technologies de l'information — Télécommunications et échange d'information entre systèmes — Services de session d'application

General Information

• Status: Published
• Publication Date: 19-May-2005
• ICS: 35.040 - Information coding
• ICS: 35.100.70 - Application layer
• Technical Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Drafting Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Current Stage: 9060 - Close of review
• Start Date: 02-Sep-2027

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 22534
First edition
2005-05-01


Information technology —
Telecommunications and information
exchange between systems —
Application session services
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Services de session d'application




Reference number
ISO/IEC 22534:2005(E)
©
ISO/IEC 2005

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ISO/IEC 22534:2005(E)
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©  ISO/IEC 2005
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ISO/IEC 22534:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
1.1 Overview. 1
1.2 Template Description. 1
2 Conformance. 2
2.1 Application Conformance. 2
2.2 Server Conformance. 2
3 Normative references. 2
4 Service Definitions. 3
4.1 Start Application Session. 3
4.1.1 Service Request. 3
4.1.2 Service Response. 4
4.1.3 Functional Requirements. 4
4.2 Stop Application Session. 5
4.2.1 Service Request. 5
4.2.2 Service Response. 5
4.2.3 Functional Requirements. 6
4.3 Reset Application Session Timer. 6
4.3.1 Service Request. 6
4.3.2 Service Response. 6
4.3.3 Functional Requirements. 7
4.4 Application Session Terminated. 7
4.4.1 Service Request. 7
4.4.2 Service Response. 7
4.4.3 Functional Requirements. 8
5 Schema Definitions. 8
5.1 Start Application Session. 8
5.2 Stop Application Session. 10
5.3 Reset Application Session Timer. 11
5.4 Application Session Terminated. 12
Annex A (informative) Examples. 14
Annex B (informative) CSTA Usage Notes. 18
Bibliography . 19

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ISO/IEC 22534:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 22534 was prepared by Ecma International (as ECMA-354) and was adopted, under a special
“fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee
SC 6, Telecommunications and information exhange between systems, in parallel with its approval by national
bodies of ISO and IEC.
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ISO/IEC 22534:2005(E)
Introduction
This International Standard defines Ecma Application Session Services – a set of XML-based services used to
establish and maintain an application session for exchanging application messages.
The application session established by this International Standard is independent of the underlying transport
protocol (TCP, HTTP, etc.) for exchanging application messages.
Sessions for application protocols such as CSTA-XML (ECMA-323) may be established using this
International Standard.

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INTERNATIONAL STANDARD ISO/IEC 22534:2005(E)

Information technology — Telecommunications and information
exchange between systems — Application session services
1 Scope
The services defined in this International Standard are used to establish and maintain a relationship between
an application and a server for the purpose of exchanging application messages. For the purpose of this
International Standard this relationship is called an application session.
Application protocols, such as ECMA-323, require that an application session is established before application
messages are exchanged. ECMA-269 specifies several mechanisms for establishing an application context.
One possible mechanism is ACSE (ISO/IEC 8649) – but since ASCE uses ASN.1 encoding for its services, it
is not desirable for use with XML based protocols such as ECMA-323.
This International Standard provides an XML-based alternative for establishing application sessions.
1.1 Overview
The Ecma Application Session Services consist of the following services:
• Start Application Session. This service is used by an application to establish an application session with a
server. A globally unique sessionID is returned by the server in the response message. The sessionID is
used in other services to address the session as long as the session exists.
• Stop Application Session. This service is used by an application to stop an application session.
• Reset Application Session Timer. This service is used by an application to reset the timer associated with
an application session. If the application timer is not reset before it expires, the application session will be
terminated.
• Application Session Terminated – This service is used by the server to indicate that the application
session has been abnormally terminated (i.e. not via the Stop Application Session service).
1.2 Template Description
The services specified in Clause 4 include tables that contain the following columns:
• Parameter Name – the name that is used to reference the parameter. This corresponds to the XML
element name specified in Clause 5.
• Type – the format of the parameter. This corresponds to the XML element type used in the XML schema
definition in Clause 5.
• M/O – the Mandatory/Optional aspect of the parameter. Mandatory parameters must be included in the
corresponding XML instance document while optional parameters may be omitted.
• Description – Describes the purpose of the parameter.
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ISO/IEC 22534:2005(E)
2 Conformance
This Clause specifies the conformance requirements for an application and a server to conform to this
International Standard.
2.1 Application Conformance
In order to conform to this International Standard an application shall:
1) Support the following services as follows:
b) Sending the Start Application Session service and all of the mandatory aspects of this service as
specified in Clause 4.
c) Sending the Stop Application Session service and all of the mandatory aspects of this service as
specified in Clause 4.
d) Sending the Reset Application Session service and all of the mandatory aspects of this service
as specified in Clause 4.
e) Receiving the Application Session Terminated service and all of the mandatory aspects of this
service as specified in Clause 4.
2) Send and receive XML Instance documents according to the XML Schema specified in Clause 5 in
this International Standard for the services listed in item 1.
2.2 Server Conformance
In order to conform to this International Standard a server shall:
1) Support the following services as follows:
a) Receiving the Start Application Session service and all of the mandatory aspects of this service
as specified in Clause 4.
b) Receiving the Stop Application Session service and all of the mandatory aspects of this service
as specified in Clause 4.
c) Receiving the Reset Application Session service and all of the mandatory aspects of this service
as specified in Clause 4.
d) Sending the Application Session Terminated service and all of the mandatory aspects of this
service as specified in Clause 4.
2) Send and receive XML Instance documents according to the XML Schema specified in Clause 5 in
this International Standard for the services listed in item 1.
3 Normative references
This Clause has no content in this document.
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ISO/IEC 22534:2005(E)
4 Service Definitions
4.1 Start Application Session
The Start Application Session service is used to initiate an application session between an application and a
server.
A globally unique identifier, called a sessionID, is returned in the positive service response that identifies the
application session.
Once an application session is established, the server must maintain information associated with the
application session. When the application session is terminated, the application context information is cleared.
The application session exists until:
• it is stopped by using a Stop Application Session service
• the session is abnormally terminated by the server as indicated by the Application Session Terminated
service (e.g., due to the session timer expiry)
• etc.
4.1.1 Service Request
Table 4-1 — Start Application Session – Service Request
Parameter Name Type M/O Description
applicationInfo Sequence M Specifies information associated with the application
requesting the application session. This information
consists of:
• applicationID (M) – a character string that identifies
the application requesting the application association.
• applicationSpecificInfo (O) – this consists of a list of
one or more implementation specific attributes
associated with the application requesting the
application association.
requestedProtocolVersions List of M Specifies one or more application protocol versions that
character the application wishes to use for the application
strings association. The list is ordered by highest priority protocol
version first.
The server shall choose the highest priority protocol
version that it supports and return the chosen protocol
version in the positive response.
The character string specifying a specific protocol must be
a globally unique string (e.g., a standardized namespace
(URI) that indicates a given protocol version).
requestedSessionDuration Value O Specifies the length of time (in seconds) that the
application session should be maintained. The
sessionDuration timer can be periodically refreshed via
the Reset Application Session Timer service.
If the requestedSessionDuration is not provided the server
will choose a default sessionDuration value.
extensions Sequence O Specifies non-standardized information.

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ISO/IEC 22534:2005(E)
4.1.2 Service Response
4.1.2.1 Positive Acknowledgement
Table 4-2 — Start Application Session – Positive Service Response
Parameter Name Type M/O Description
sessionID Character M Specifies the globally unique identifier associated with the
String application session that has been created.
actualProtocolVersion Character M Specifies the protocol version that is being used for the
String application session. This protocol version shall be one of
the protocol versions specified in the service request.
actualSessionDuration Value M Specifies the value for the length of time (in seconds) that
the application session will be maintained by the server.
This value may be less than or equal to the
requestedSessionDuration in the service request.
If the requestedSessionDuration is not provided in the
service request, the server shall provide a default value
which shall be used for the application session.
extensions Sequence O Specifies non-standardized information.

4.1.2.2 Negative Acknowledgement
Table 4-3 — Start Application Session – Negative Service Response
Parameter Type M/O Description
Name
errorCode Character M Specifies the type of error.
String
Either a standardized error or an application specific error may be used.
The standardized set of errors are:
• invalidApplicationInfo – the server is unable to establish an
application session due to invalid or unrecognized information
in the applicationInfo parameter.
• requestedProtocolVersionNotSupported – none of the
requested protocol versions specified in the service request are
supported.
• serverResourcesBusy – the server cannot establish an
application session due to internal resource constraints.
• maxNumberSessions – the server cannot create an application
session because it has reached the maximum number of
allowed application sessions (e.g. license/provisioning
limitations).
extensions Sequence O Specifies non-standardized information.

4.1.3 Functional Requirements
1. The sessionID returned in the response is used in other Ecma Application Session services
to manage the application session.
2. The positive response includes the actual value of the sessionDuration used for the specified
application session. This value may be less than what the application requested in the
service request.
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ISO/IEC 22534:2005(E)
3. For an existing session, an application can restart the sessionDuration timer by using the
Reset Application Session Timer service.
4. Once the sessionDuration timer expires the server shall terminate the application session
and clear any application context information associated with the application session.
5. Mechanisms defined outside of this International Standard may be used to authenticate a
user before an application session is started.
4.2 Stop Application Session
The Stop Application Session service is used by the application to terminate an existing
application session.
4.2.1 Service Request
Table 4-4 — Stop Application Session – Service Request
Parameter Name Type M/O Description
sessionID Character M Specifies the globally unique identifier associated with the
String application session that is being stopped.
sessionEndReason Character O Specifies the reason that the application session is being
String stopped.
Either a standardized reason or an application specific
reason may be used. The standardized set of reasons are:
• normal – the application is no longer interested in
maintaining this application association.
extensions Sequence O Specifies non-standardized information.

4.2.2 Service Response
4.2.2.1 Positive Acknowledgement
Table 4-5 — Stop Application Session – Positive Service Response
Parameter Name Type M/O Description
extensions Sequence O Specifies non-standardized information.

4.2.2.2 Negative Acknowledgement
Table 4-6 — Stop Application Session – Negative Service Response
Parameter Type M/O Description
Name
errorCode Character M Specifies the type of error.
String
Either a standardized error or an application specific error may be
used. The standardized set of errors are:
• invalidSessionID – the sessionID is not valid or known by the
server.
extensions Sequence O Specifies non-standardized information.

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ISO/IEC 22534:2005(E)
4.2.3 Functional Requirements
1) If the server does not recognize the sessionID in the service request it shall provide a negative
service response with the error code “invalidSessionID”.
4.3 Reset Application Session Timer
The Reset Application Session Timer service is used by the application to reset the duration that an existing
application session should be maintained.
4.3.1 Service Request
Table 4-7 — Reset Application Session Timer – Service Request
Parameter Name Type M/O Description
sessionID Character M Specifies the globally unique identifier associated with the
String application session whose timer is being reset.
requestedSessionDuration Value O Specifies the new value for the length of time (in seconds)
that the application requests that the server maintain the
application session.
extensions Sequence O Specifies non-standardized information.

4.3.2 Service Response
4.3.2.1 Positive Acknowledgement
Table 4-8 — Reset Application Session Timer – Positive Service Response
Parameter Name Type M/O Description
actualSessionDuration Value M Specifies the new value for the length of time (in seconds)
that the application session will be maintained by the
server.
This value may be less than or equal to the
requestedSessionDuration in the service request.
If the requestedSessionDuration is not provided in the
service request, the server shall provide a default value
which shall be used for the application session.
extensions Sequence O Specifies non-standardized information.

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ISO/IEC 22534:2005(E)
4.3.2.2 Negative Acknowledgement
Table 4-9 — Reset Application Session Timer – Negative Service Response
Parameter Type M/O Description
Name
errorCode Character M Specifies the type of error.
String
Either a standardized error or an application specific error may be
used. The standardized set of errors are:
• invalidSessionID – the sessionID is not valid or known by the
server.
• serverCannotResetSessionDuration – the server cannot reset
the session timer associated with the application session.
extensions Sequence O Specifies non-standardized information.

4.3.3 Functional Requirements
1) A positive response to the service request indicates that the server has reset the session timer
associated with the specified application session.
2) The positive response includes the actual value of the sessionTimer used for the specified
application session. This value may be less than what the application requested in the service
request.
4.4 Application Session Terminated
The Application Session Terminated service is sent by a server when the server has terminated an application
session.
4.4.1 Service Request
Table 4-10 — Application Session Terminated – Service Request
Parameter Name Type M/O Description
sessionID Character M Specifies globally unique identifier associated with the
String application session that is being terminated.
sessionEndReason Character M Specifies the reason that the application session has been
String terminated.
Either a standardized reason or an application specific
reason may be specified. The standardized set of reasons
are:
• resourceLimitation – application session terminated
due to resource constraints.
• sessionTimerExpired – application session terminated
due to the sessionTimer expiry.
extensions Sequence O Specifies non-standardized information.

4.4.2 Service Response
There is no acknowledgement to this service request.
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ISO/IEC 22534:2005(E)
4.4.3 Functional Requirements
1) When the server terminates an application session, it clears all of the application context information
associated with the application session.
5 Schema Definitions
5.1 Start Application Session

xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
attributeFormDefault="unqualified">


 Ecma-Start-Application-Session



 
 
  
  
   
   
   
    
    
     
    
    
   
   
  
  
  
  
   
   
   
  
  
  
  
  
   
   
   
  
  
 
 



 
 
  
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ISO/IEC 22534:2005(E)
5.2 Stop Application Session

elementFormDefault="qualified" attributeFormDefault="unqualified">

 
  Ecma-Stop-Application-Session