ISO/IEC 14651 - Misplaced Pages

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Last update: September 2018 (July 2021)

ISO/IEC 14651:2016, Information technology -- International string ordering and comparison -- Method for comparing character strings and description of the common template tailorable ordering, is an International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC) standard specifying an algorithm that can be used when comparing two strings. This comparison can be used when collating a set of strings. The standard also specifies a data file, the Common Tailorable Template (CTT), which outlines the comparison order. This order is meant to be tailored for different languages, making the CTT a template rather than a default. In many cases, however, the empty tailoring—where no weightings are changed—is appropriate, as different languages have incompatible ordering requirements. One such tailoring is European ordering rules (EOR), which in turn is supposed to be tailored for different European languages.

The Common Tailorable Template (CTT) data file of this ISO/IEC standard is aligned with the Default Unicode Collation Entity Table (DUCET) datafile of the Unicode collation algorithm (UCA) specified in Unicode Technical Standard #10.

This is the fourth edition of the standard and was published on 2016-02-15, corrected on 2016-05-01 and covers up to and including Unicode 8.0. One additional amendment Amd.1:2017 was published in September 2017 and covers up to and including Unicode 9.0.

External links and references

ISO site, "ISO/IEC 14651:2016". ISO/IEC 14651:2016 and Amd.1:2017 are freely available from the ISO website
"What are the differences between the UCA and ISO 14651?"

Unicode

Code points

Characters

Special purpose	BOM Combining grapheme joiner Left-to-right mark / Right-to-left mark Soft hyphen Variant form Word joiner Zero-width joiner Zero-width non-joiner Zero-width space
Lists	Characters CJK Unified Ideographs Combining character Duplicate characters Numerals Scripts Spaces Symbols Halfwidth and fullwidth Alias names and abbreviations Whitespace characters

Processing

Algorithms	Bidirectional text Collation ISO/IEC 14651 Equivalence Variation sequences International Ideographs Core
Comparison of encodings	BOCU-1 CESU-8 Punycode SCSU UTF-1 UTF-7 UTF-8 UTF-16/UCS-2 UTF-32/UCS-4 UTF-EBCDIC

On pairs of
code points

Usage

Related standards

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Scripts and symbols in Unicode
Common and inherited scripts	Combining marks Diacritics Punctuation marks Spaces Numbers
Modern scripts	Adlam Arabic Armenian Balinese Bamum Batak Bengali Bopomofo Braille Buhid Burmese Canadian Aboriginal Chakma Cham Cherokee CJK Unified Ideographs (Han) Cyrillic Deseret Devanagari Garay Geʽez Georgian Greek Gujarati Gunjala Gondi Gurmukhi Gurung Khema Hangul Hanifi Rohingya Hanja Hanunuoo Hebrew Hiragana Javanese Kanji Kannada Katakana Kayah Li Khmer Kirat Rai Lao Latin Lepcha Limbu Lisu (Fraser) Lontara Malayalam Masaram Gondi Mende Kikakui Medefaidrin Miao (Pollard) Mongolian Mru N'Ko Nag Mundari New Tai Lue Nüshu Nyiakeng Puachue Hmong Odia Ol Chiki Ol Onal Osage Osmanya Pahawh Hmong Pau Cin Hau Pracalit (Newa) Ranjana Rejang Samaritan Saurashtra Shavian Sinhala Sorang Sompeng Sundanese Sunuwar Syriac Tagbanwa Tai Le Tai Tham Tai Viet Tamil Tangsa Telugu Thaana Thai Tibetan Tifinagh Tirhuta Toto Vai Wancho Warang Citi Yi
Ancient and historic scripts	Ahom Anatolian hieroglyphs Ancient North Arabian Avestan Bassa Vah Bhaiksuki Brāhmī Carian Caucasian Albanian Coptic Cuneiform Cypriot Cypro-Minoan Dives Akuru Dogra Egyptian hieroglyphs Elbasan Elymaic Glagolitic Gothic Grantha Hatran Imperial Aramaic Inscriptional Pahlavi Inscriptional Parthian Kaithi Kawi Kharosthi Khitan small script Khojki Khudawadi Khwarezmian (Chorasmian) Linear A Linear B Lycian Lydian Mahajani Makasar Mandaic Manichaean Marchen Meetei Mayek Meroitic Modi Multani Nabataean Nandinagari Ogham Old Hungarian Old Italic Old Permic Old Persian cuneiform Old Sogdian Old Turkic Old Uyghur Palmyrene ʼPhags-pa Phoenician Psalter Pahlavi Runic Sharada Siddham Sogdian South Arabian Soyombo Sylheti Nagri Tagalog (Baybayin) Takri Tangut Todhri Tulu Tigalari Ugaritic Vithkuqi Yezidi Zanabazar Square
Notational scripts	Duployan SignWriting
Symbols, emojis	Cultural, political, and religious symbols Currency Control Pictures Mathematical operators and symbols Glossary Phonetic symbols (including IPA) Emoji
Category: Unicode Category: Unicode blocks

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