ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
<LONG DOCTYPE>
<Title;
[Part <n>: Part element of title;
[Sub-part <m>: Sub-part element of title]]>
[Release #]
[<Endorsed document (date or version n°)>] or
[<Endorsed document (date or version n°), modified>]
In the case that an ETSI deliverable would become almost identical to (i.e. with or without modifications use the entirety of) a
document from another standards organization, a Technical Body may decide to prepare an ETSI deliverable defining only the
differences, if any, between that document (commonly called "endorsed document") and the ETSI deliverable.
Such an ETSI deliverable, commonly called "endorsement", shall be drafted in accordance with the ETSI Drafting Rules, (see also
clause 9).
The guidance text (green) shall be removed when no longer needed.

[Part element for endorsement]
2
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Reference
<Workitem>
Keywords
<keywords>
ETSI
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Important notice
The present document can be downloaded from:
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The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
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existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute yyyy.
All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
[Part element for endorsement]
3
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Logos on the front page
If a logo is to be included, it should appear below the title on the right hand side of the cover page
Copyrights on page 2
This paragraph should be used for deliverables processed before WG/TB approval and used in meetings.
Reproduction is only permitted for the purpose of standardization work undertaken within ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
If an additional copyright is necessary, it shall appear on page 2 after the ETSI copyright notification.
The additional EBU copyright applies for EBU and DVB documents.
© European Broadcasting Union yyyy.
The additional CENELEC copyright applies for ETSI/CENELEC documents.
© Comité Européen de Normalisation Electrotechnique yyyy.
The additional CEN copyright applies for CEN documents.
© Comité Européen de Normalisation yyyy.
The additional WIMAX copyright applies for WIMAX documents.
© WIMAX Forum yyyy.
ETSI
[Part element for endorsement]
4
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Contents (style TT)
If you need to update the Table of Content you would need to first unlock it.
To unlock the Table of Contents: select the Table of Contents, click simultaneously: Ctrl + Shift + F11.
To update the Table of Contents: F9.
To lock it: select the Table of Contents and then click simultaneously: Ctrl + F11.
Logos on the front page ...................................................................................................................................... 3
Copyrights on page 2.......................................................................................................................................... 3
If an additional copyright is necessary, it shall appear on page 2 after the ETSI copyright notification. ......... 3
Intellectual Property Rights ................................................................................................................................ 5
Foreword............................................................................................................................................................. 5
Transposition table ............................................................................................................................................................. 5
Modal verbs terminology ................................................................................................................................... 5
Executive summary ............................................................................................................................................ 6
Introduction ........................................................................................................................................................ 6
1
Scope ........................................................................................................................................................ 6
2
References ................................................................................................................................................ 6
2.1
2.2
3
3.1
3.2
3.3
Normative references ......................................................................................................................................... 6
Informative references ....................................................................................................................................... 7
Definitions, symbols and abbreviations ................................................................................................... 7
Definitions ......................................................................................................................................................... 7
Symbols ............................................................................................................................................................. 8
Abbreviations ..................................................................................................................................................... 8
Endorsement notice ............................................................................................................................................ 8
Global modifications to <endorsed document>.................................................................................................. 9
Annex <ZA> (normative): Title of normative annex .................................................................................. 10
ZA.1 First clause of the annex ......................................................................................................................... 10
ZA.1.1
First subdivided clause of the annex ................................................................................................................ 10
Annex <ZB> (informative): Bibliography .................................................................................................... 11
Annex <F> (informative): Change History .................................................................................................. 11
History .............................................................................................................................................................. 12
ETSI
[Part element for endorsement]
5
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
<PAGE BREAK>
Intellectual Property Rights (style H1)
This clause is always the first unnumbered clause.
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword (style H1)
This unnumbered clause is mandatory and shall appear just after the IPR clause.
Replace all <parameters> with the appropriate text.
The following fixed text elements for the foreword are identified for SRs,
TRs TSs and GSs.
This <long doctype> (<doctype>) has been produced by {ETSI Technical Committee|ETSI Project|<other>} <long
techbody> (<short techbody>).
The following fixed text elements for the foreword are identified for ENs,
ESs and EGs.
This {draft|final draft} <long doctype> (<doctype>) has been produced by {ETSI Technical Committee|ETSI
Project|<other>} <long techbody> (<short techbody>){|, and is now submitted for the {combined Public Enquiry and
Vote|Vote phase of the ETSI standards {Membership Approval Procedure||<approval phase> phase of the ETSI
standards EN Approval Procedure|Two-step Approval Procedure}}}.
Transposition table
Each European Standard (EN) shall contain a transposition table as the last element in the Foreword, see clause 2.5.1 of
EDRs.
Proposed national transposition dates
Date of latest announcement of this EN (doa):
3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e):
6 months after doa
Date of withdrawal of any conflicting National Standard (dow):
6 months after doa
Modal verbs terminology (style H1)
This unnumbered clause is a mandatory informative element and shall appear just after the "Foreword".
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
[Part element for endorsement]
6
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Executive summary (style H1)
This unnumbered clause, if present, appears after the "Modal verbs terminology" and before the "Introduction". It is an
optional informative element and shall not contain requirements.
The "Executive summary" is used, if required, to summarize the ETSI deliverable. It contains enough information for the
readers to become acquainted with the full document without reading it. It is usually one page or shorter.
Introduction (style H1)
This unnumbered clause, if present, appears just before the "Scope". It is an optional informative element and shall not
contain requirements.
<PAGE BREAK>
CLAUSE NUMBERING STARTS HEREAFTER.
Automatic numbering may be used in ETSI deliverables but it is highly recommended to use sequence numbering.
Check http://portal.etsi.org/edithelp/Files/other/EDRs_navigator.chm clauses 2.12.1.1 and 6.9.2 for help.
1
Scope (style H1)
This clause numbered 1 shall start on a new page. More details can be found in clause 2.9 of the EDRs.
The Scope shall not contain requirements. Forms of expression such as the following should be used:
The present document …
EXAMPLE:
The present document provides the necessary adoptions to the endorsed document.
<PAGE BREAK>
2
References (style H1)
This clause numbered 2 appears just after the "Scope". It is a required element.
The following text block applies. More details can be found in clause 2.10 of the EDRs.
2.1
Normative references (style H2)
Clause 2.1 shall only contain normative (essential) references, which are cited in the document itself. These
references have to be publicly available and in English.
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE:
While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.

Use the EX style, enclose the number in square brackets and separate it from the title with a tab (you may use
sequence fields for automatically numbering references, see clause 6.9.2: "Sequence numbering") (see
example).
EXAMPLE:
[1] [tab] <Standard Organization acronym> <document number>: "<Title>".
ETSI
[Part element for endorsement]
7
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
[2] [tab] <Standard Organization acronym> <document number>: "<Title>".
2.2
Informative references (style H2)
Clause 2.2 shall only contain informative references, which are cited in the document itself.
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE:
While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.

Use the EX style, add the letter "i" (for informative) before the number (which shall be in square brackets) and
separate this from the title with a tab (you may use sequence fields for automatically numbering references, see
clause 6.9.2: "Sequence numbering") (see example).
EXAMPLE:
[i.1] [tab]<Standard Organization acronym> <document number> <V#>: "<Title>".
[i.2] [tab]<Standard Organization acronym> <document number>: "<Title>".
3
Definitions, symbols and abbreviations (style H1)
Delete from the above heading the word(s) which is/are not applicable, (see clause 2.11 of EDRs).
Definitions and abbreviations extracted from ETSI deliverables can be useful when drafting documents and can be
consulted via the Terms and Definitions Interactive Database (TEDDI) (http://webapp.etsi.org/Teddi/).
3.1
Definitions (style H2)
Clause numbering depends on applicability.

A definition shall not take the form of, or contain, a requirement.

The form of a definition shall be such that it can replace the term in context. Additional information shall be
given only in the form of examples or notes (see below).

The terms and definitions shall be presented in alphabetical order.
The following text block applies. More details can be found in clause 2.11.1 of the EDRs.
For the purposes of the present document, the [following] terms and definitions [given in ... and the following] apply:
Definition format

Use the Normal style.

The term shall be in bold, and shall start with a lower case letter (unless it is always rendered with a leading
capital) followed by a colon, one space, and the definition starting with a lower case letter and no ending
full-stop.
<defined term>: <definition>
EXAMPLE: text used to clarify abstract rules by applying them literally
NOTE:
This may contain additional information.
ETSI
[Part element for endorsement]
3.2
8
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Symbols (style H2)
Symbols should be ordered alphabetically. Clause numbering depends on applicability.
The following text block applies. More details can be found in clause 2.11.2 of the EDRs.
For the purposes of the present document, the [following] symbols [given in ... and the following] apply:
Symbol format

Use the EW style and separate this from the definition with a tab. Use the EX style for the last term.
<1st symbol>  [tab]<1st Explanation> (style EW)
<2nd symbol>  [tab]<2nd Explanation> (style EW)
<3rd symbol>  [tab]<3rd Explanation> (style EX)
3.3
Abbreviations (style H2)
Abbreviations should be ordered alphabetically. Clause numbering depends on applicability.
The following text block applies. More details can be found in clause 2.11.2 of the EDRs.
For the purposes of the present document, the [following] abbreviations [given in ... and the following] apply:
Abbreviation format

Use the EW style and separate this from the definition with a tab. Use the EX style for the last term.
<1st ACRONYM>  [tab]<Explanation> (style EW)
<2nd ACRONYM>  [tab]<Explanation> (style EW)
<3rd ACRONYM>  [tab]<Explanation> (style EX)
Endorsement notice (style H1)
If the endorsed document is referred to without modifications, the following text should be used:
All elements of <endorsed document> apply.
If the endorsed document is referred to with modifications, one of the following text blocks should be used:
-
In the simple case where it is only required to directly modify elements of text from the endorsed document:
The elements of <endorsed document> apply, with the following modifications:
NOTE:
Underlining and/or strike-out are used to highlight detailed modifications where necessary.
or
-
In more complex cases, where (for example) additional requirements are added:
The present document, in conjunction with ................. provides the specifications for ........................
The modifications shall be presented in order following the sequence of clauses of the endorsed document. General
modifications shall precede specific modifications.
The use of revision marks for the presentation of the modifications is recommended.
or
The present document endorses <endorsed document>, the contents of which apply together with the addition of the
modifications being covered herein.
In such cases, it is assumed that it will not be so easy to clearly identify the differences between the endorsed document
and the endorsing document.
For more details, see clause 9 of the ETSI Drafting Rules (EDRs).
ETSI
[Part element for endorsement]
9
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
Global modifications to <endorsed document>
For the modified clauses of the endorsed document located hereafter, apply "H6" style to the clause headers so that they
do not appear in the table of contents.
Throughout the text of the <endorsed document> <H6>
When some references of the endorsed document need to be replaced by others for the applicability of the
endorsement, they will be listed in the following table.
EXAMPLE:
Replace references as shown in table X.
Table X
Reference(s) in <endorsed document> [X]
ITU-T Recommendation Q.1901
1
Replaced reference(s)
ETSI EN 301 234
When additional references are needed for the applicability of the ETSI endorsement, they may be listed in this clause.
Clause X "References" <H6>
For the purposes of the present document the following references apply:
ETSI EN 301 234: "Title".
For replaced text, only specify which part of the text has to be replaced. No need of underline.
EXAMPLE:
Clause 3.1 <H6>
Replace the definition of "access" as follows:
access: function required to initiate or request a service
For added text, specify the place in the document where the text has to be added but there is no need to underline.
EXAMPLE:
Add the following clause:
Clause 4 <H6>
The P-CSCF interacts with the RACS in order to do the following:
-
Request bindings data between the different IP addresses (NA(P)T or NA(P)T-PT) upon session
initiation/modification."
For specific modifications of the original text (e.g. part of the text which has to be added), use the underline style
from the format font menu.
EXAMPLE:
Clause 5 <H6>
"Modify the text as follows:
In the following sections, user roaming/nomadism procedures apply to cases where P-CSCF is located in the visited
network. Procedures for cases where the user is visiting an access network outside the home network boundary and the
P-CSCF is located in the home network are similar to procedures for a non-roaming/non-nomadic user."
ETSI
[Part element for endorsement]
10
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
For deleted text (e.g. part of the text or an entire paragraph which has to be deleted), use the strikethrough option
from the format font menu.
EXAMPLE 1:
Clause 6 <H6>
"Modify the text as follows:
-
For Multi-Media type services delivered via the PS Domain within this architecture, a single session control
protocol shall be used between the user equipment UE and the CSCF (over the Gm reference point).
EXAMPLE 2:
"Delete 5th paragraph of clause 7.1:
-
If the call is coming from a µ-law PSTN network, the O-IWU shall send an SDP Offer with both µ-law
(PCMU) and A-law (PCMA) included in the media description and PCMU shall take precedence over
PCMA."
For an entire clause to be deleted, specify only the clause number which needs to be removed.
EXAMPLE:
Clause 6.1 <H6>
Delete clause 6.1 as is not applicable.
Annexes of the endorsement shall be with two letters, the first letter always being Z (i.e. ZA, ZB, ZC, etc.), in order to
avoid confusion with any annexes of the endorsed document.
Each annex shall start on a new page (insert a page break between annex ZA and ZB, annex ZB and ZC, ...).
For the annex heading use the Heading 8 style (for TR and SR use the Heading 9 style) and insert a line break ("shift" +
 "enter") between the colon and the title.
For all annex clause headings use the appropriate Heading styles, starting from Heading 1, e.g. for clause ZA.1 use
Heading 1, for clause ZA.1.1 use Heading 2. (More details about the ETSI styles are provided in clause 6.1 of the ETSI
Drafting Rules).
The annexes may be either normative or informative.
<PAGE BREAK>
Annex <ZA> (normative):
Title of normative annex (style H8 or H9)
ZA.1
First clause of the annex (style H1)
ZA.1.1 First subdivided clause of the annex (style H2)
<Text>
ETSI
[Part element for endorsement]
11
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
<PAGE BREAK>
Annex <ZB> (informative):
Bibliography (style H8 or H9)
This optional informative clause shall start on a new page and be the last annex of an ETSI deliverable or the last but
one if followed by the "Change history/Change request history" annex, if any. The Bibliography shall not contain
requirements.
The Bibliography identifies additional reading material not mentioned within the document. Those publications might
or might not be publicly available (no check is made by the ETSI Secretariat).
The Bibliography shall include list of standards, books, articles, or other sources on a particular subject which are not
referenced in the document.
The Bibliography shall not include references mentioned in the deliverable.

Use Heading 8 style for the "Bibliography" annex, see clause 2.13 for examples.

For the listed material use the Normal style or bulleted lists (e.g. B1+), do not use numbered references.
<Publication>: "<Title>".
OR

<Publication>: "<Title>".
<PAGE BREAK>
Annex <F> (informative):
Change History (style H8 or H9)
The informative clause shall start on a new page and be the last annex before the "History" clause. It is an optional,
informative element and shall not contain requirements.
If it is desired to keep a detailed record of the changes implemented in a new version it is recommended that this is
done by inserting a "Change history/Change request" annex, see clause 2.15.
It shall be presented as a table. Apply the normal style format for tables (see clause 5.2.2 of the EDRs).
Date
Version
October 2011
1.1.1
February 2012
1.2.1
Information about changes
First publication of the TS after approval by TC SPAN at SPAN#19
(30 September - 2 October 2011; Prague)
Implemented Change Requests:
SPAN(12)20_019 Error message information clarifications
SPAN(12)20_033 Revised error message information
SPAN(12)20_046 update of figure 3 clause 9.2
These CRs were approved by TC SPAN#20 (3 - 5 February 2012; Sophia)
Version 1.2.1 prepared by the Rapporteur
Implemented Changes:
July 2013
1.3.1
Correction needed because the previously approved version did not contain the last
version of the ASN.1 and XML attachments.
Version 1.3.1 prepared by the Rapporteur
ETSI
[Part element for endorsement]
12
ETSI <doctype> <#> V<m.t.e> (<yyyy-mm>)
<PAGE BREAK>
History (style H1)
This unnumbered clause shall start on a new page and be the last clause of an ETSI deliverable. It is a required
informative element and shall not contain requirements.
The "History" identifies the major milestones in the life of an ETSI deliverable through the means of a table. The history
box shall be provided by the ETSI Secretariat (all additional information will be removed at the publication stage).
Document history
<Version>
<Date>
<Milestone>
A few examples:
Document history
V1.1.1
February 2002
Public Enquiry
PE XXXX:
yyyy-mm-dd to yyyy-mm-dd
V1.1.1
October 2002
Vote
V XXXX:
yyyy-mm-dd to yyyy-mm-dd
V1.1.1
April 2003
Publication
V1.2.1
May 2003
EN Approval Procedure
AP XXXX:
yyyy-mm-dd to yyyy-mm-dd
V1.3.1
June 2012
Pre-Processing done before TB approval
e-mail: mailto:edithelp@etsi.org
1.3.2
July 2013
Clean-up done by editHelp!
e-mail: mailto:edithelp@etsi.org
Latest changes made on 2015-05-07
ETSI