ISO/IEC 14651:2007 信息技术 国际串排序和比较 字符串比较方法和公共模板定制说明

标准编号：ISO/IEC 14651:2007

中文名称：信息技术 国际串排序和比较 字符串比较方法和公共模板定制说明

英文名称：Information technology — International string ordering and comparison — Method for comparing character strings and description of the common template tailorable ordering

发布日期：2007-12

标准范围

This International Standard defines the followings.? A reference comparison method. This method is applicable to two character strings to determine theircollating order in a sorted list. The method can be applied to strings containing characters from the fullrepertoire of ISO/IEC 10646. This method is also applicable to subsets of that repertoire, such as those ofthe different ISO/IEC 8-bit standard character sets, or any other character set, standardised or not, toproduce ordering results valid (after tailoring) for a given set of languages for each script. This methoduses collation tables derived either from the Common Template Table defined in this InternationalStandard or from one of its tailorings. This method provides a reference format. The format is describedusing the Backus-Naur Form (BNF). This format is used to describe the Common Template Table. Theformat is used normatively within this International Standard.? A Common Template Table. A given tailoring of the Common Template Table is used by the referencecomparison method. The Common Template Table describes an order for all characters encoded inISO/IEC 10646:2003 up to Amendment 2, plus characters DEVANAGARI LETTER GGA, DEVANAGARILETTER 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. Thistable enables the specification of a string ordering adapted to local ordering rules, without requiring animplementer 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 mainworldwide benefit is that, for other scripts, often no modification is required and the order will remain as consistent aspossible 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 Standardversion 5.0.? A reference name. The reference name refers to this particular version of the Common Template Table, foruse as a reference when tailoring. In particular, this name implies that the table is linked to a particularstage 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 CommonTemplate 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 ofnumeric keys is not mandated either.? A context-dependent ordering.? Any particular preparation of character strings prior to comparison.

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