ISO/IEC 14651:2007 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering
This International Standard defines the followings.
? A reference comparison method. This method is applicable to two character strings to determine their
collating order in a sorted list. The method can be applied to strings containing characters from the full
repertoire of ISO/IEC 10646. This method is also applicable to subsets of that repertoire, such as those of
the different ISO/IEC 8-bit standard character sets, or any other character set, standardised or not, to
produce ordering results valid (after tailoring) for a given set of languages for each script. This method
uses collation tables derived either from the Common Template Table defined in this International
Standard or from one of its tailorings. This method provides a reference format. The format is described
using the Backus-Naur Form (BNF). This format is used to describe the Common Template Table. The
format is used normatively within this International Standard.
? A Common Template Table. A given tailoring of the Common Template Table is used by the reference
comparison method. The Common Template Table describes an order for all characters encoded in
ISO/IEC 10646:2003 up to Amendment 2, plus characters DEVANAGARI LETTER GGA, DEVANAGARI
LETTER JJA, DEVANAGARI LETTER DDDA and DEVANAGARI LETTER BBA (characters U097B,
U097C, U097E and U097F, respectively). It allows for a specification of a fully deterministic ordering. This
table enables the specification of a string ordering adapted to local ordering rules, without requiring an
implementer to have knowledge of all the different scripts already encoded in the UCS.
NOTE 1 This Common Template Table is to be modified to suit the needs of a local environment. The main
worldwide benefit is that, for other scripts, often no modification is required and the order will remain as consistent as
possible and predictable from an international point of view.
NOTE 2 The character repertoire used in this International Standard is equivalent to that of the Unicode Standard
version 5.0.
? A reference name. The reference name refers to this particular version of the Common Template Table, for
use as a reference when tailoring. In particular, this name implies that the table is linked to a particular
stage of development of the ISO/IEC 10646 Universal multiple-octet coded character set.
? Requirements for a declaration of the differences (delta) between the collation table and the Common
Template Table.
This International Standard does not mandate the following.
? A specific comparison method; any equivalent method giving the same results is acceptable.
? A specific format for describing or tailoring tables in a given implementation.
? Specific symbols to be used by implementations, except for the name of the Common Template Table.
? Any specific user interface for choosing options.
? Any specific internal format for intermediate keys used when comparing, nor for the table used. The use of
numeric keys is not mandated either.
? A context-dependent ordering.
? Any particular preparation of character strings prior to comparison.
ISO/IEC 14651:2007 history
2020ISO/IEC 14651:2020 Information technology -- International string ordering and comparison -- Method for comparing character strings and description of the common template tailorable ordering
2019ISO/IEC 14651:2019 Information technology — International string ordering and comparison — Method for comparing character strings and description of the common template tailorable ordering
2017ISO/IEC 14651:2016/Amd 1:2017 Information technology — International string ordering and comparison — Method for comparing character strings and description of the common template tailorable ordering — Amendment 1
2016ISO/IEC 14651:2016 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering
2015ISO/IEC 14651:2011/Amd 2:2015 Amendment 2 - Information technology -- International string ordering and comparison -- Method for comparing character strings and description of the common template tailorable ordering
2012ISO/IEC 14651:2011/Amd 1:2012 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering; Amendment 1
2011ISO/IEC 14651:2011 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering
2009ISO/IEC 14651:2007/Amd 1:2009 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering; Amendment 1
2007ISO/IEC 14651:2007 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering
2006ISO/IEC 14651:2001/Amd 3:2006 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering; Amendment 3
2005ISO/IEC 14651:2001/Amd 2:2005 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering; Amendment 2
2003ISO/IEC 14651:2001/Amd 1:2003 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering; Amendment 1
2001ISO/IEC 14651:2001 Information technology - International string ordering and comparison - Method for comparing character strings and description of the common template tailorable ordering