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3GPP TR 21.801 V8.1.0 (2008-03)
Technical Report
3rd Generation Partnership Project;
Technical Specification Group Services and System Aspects;
Specification drafting rules
(Release 8)

Foreword
This Technical Report has been produced by the 3rd Generation Partnership Project (3GPP) Secretariat on behalf of the 3GPP Technical Specification Groups (TSGs).
The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows:
Version x.y.z

where:
x    the first digit:
1    presented to TSG for information;
2    presented to TSG for approval;
3    or greater indicates TSG approved document under change control.
y    the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.
z    the third digit is incremented when editorial only changes have been incorporated in the document.

The present document is based ISO/IEC Directives. Most clauses of the ISO/IEC document have been retained, while some clauses have been modified or deleted. Additional material has been inserted.
Items concerning word-processor specific layout and formatting matters when using the Microsoft Word for Windows based skeleton documents and templates are shown with shaded background. Boiler plate text (i.e. text which shall be directly used in 3GPP specifications) is represented by italic characters.

1    Scope
The present document specifies rules for the structure and drafting of documents intended to become a 3GPP Technical Specification or Technical Report. These rules are intended to ensure that such documents are drafted in as uniform a manner as is practicable, irrespective of the technical content.
The present document is based on the ISO/IEC Directives, Part 3, but is a self-contained document that will be maintained as such.
These drafting rules complement the 3GPP Working Procedures.

2    References
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
•    References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
•    For a specific reference, subsequent revisions do not apply.

•    For a non-specific reference, the latest version applies.  In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]    ISO/IEC Directives - Part 3 (1997): "Rules for the structure and drafting of International Standards".
[2]    ISO/IEC Guide 2:1996: "Standardization and related activities - General vocabulary".
[3]    3GPP TR 21.905: "Vocabulary for 3GPP Specifications".

3    Definitions and abbreviations
3.1    Definitions
For the purposes of the present document, the terms and definitions given in 3G TR 21.905 [3] and the following apply:
informative elements: those elements that provide additional information intended to assist the understanding or use of the 3GPP TS or 3GPP TR