Ideographic Research Group
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The Ideographic Research Group (IRG), formerly called the Ideographic Rapporteur Group, is a subgroup of Working Group 2 (WG2) of
ISO/IEC JTC 1/SC 2 ISO/IEC JTC 1/SC 2 Coded character sets is a standardization subcommittee of the Joint Technical Committee ISO/IEC JTC 1 of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC), that devel ...
(SC 2), the subcommittee of the Joint Technical Committee of
ISO ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to: Business and finance * Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso ...
and
IEC The International Electrotechnical Commission (IEC; in French: ''Commission électrotechnique internationale'') is an international standards organization that prepares and publishes international standards for all electrical, electronic and r ...
which is responsible for developing standards within the field of coded character sets. IRG is composed of experts from China, Japan, South Korea, Vietnam and other countries and regions that use
Han characters Chinese characters () are logograms developed for the writing of Chinese. In addition, they have been adapted to write other East Asian languages, and remain a key component of the Japanese writing system where they are known as ''kanji' ...
, as well as experts representing the
Unicode Consortium The Unicode Consortium (legally Unicode, Inc.) is a 501(c)(3) non-profit organization incorporated and based in Mountain View, California. Its primary purpose is to maintain and publish the Unicode Standard which was developed with the intenti ...
. The group is responsible for coordinating the addition of new
CJK unified ideographs The Chinese, Japanese and Korean (CJK) scripts share a common background, collectively known as CJK characters. In the process called Han unification, the common (shared) characters were identified and named CJK Unified Ideographs. As of Unicode ...
to the Universal Multiple-Octet Coded Character Set (ISO/IEC 10646) and the
Unicode Standard Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, whic ...
. The group meets twice a year for 4-5 days each time, and reports its activity to the subsequent meeting of WG2.


History

The precursor to the Ideographic Rapporteur Group was the CJK Joint Research Group (CJK-JRG), which was established in 1990. In October 1993 this group was established as a subgroup of WG2 under SC2 with the name Ideographic Rapporteur Group (IRG). In June 2019 SC2 changed the name of the subgroup to Ideographic Research Group (IRG). The IRG rapporteur from 1993 to 2004 was Zhang Zhoucai (张轴材), who had been convenor and chief editor of CJK-JRG from 1990 to 1993. Since 2004 the rapporteur has been Professor Lu Qin (陸勤) of the
Hong Kong Polytechnic University The Hong Kong Polytechnic University (PolyU) is a public research university located in Hung Hom, Hong Kong near Hung Hom station. The University is one of the eight government-funded degree-granting tertiary institutions in Hong Kong. Founded ...
. In June 2018 the title of "Rapporteur" was changed to "Convenor".


Overview

IRG is responsible for reviewing proposals for adding new
CJK unified ideographs The Chinese, Japanese and Korean (CJK) scripts share a common background, collectively known as CJK characters. In the process called Han unification, the common (shared) characters were identified and named CJK Unified Ideographs. As of Unicode ...
to the Universal Multiple-Octet Coded Character Set (ISO/IEC 10646) and the
Unicode Standard Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, whic ...
, and submitting consolidated proposals for sets of CJK unified ideographs to WG2, which are then processed for encoding in the ISO/IEC 10646 and Unicode standards by SC2 and the Unicode Technical Committee respectively. National and liaison bodies of SC2 that participate in IRG include
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ...
,
Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
,
North Korea North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Y ...
,
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
,
Macau Macau or Macao (; ; ; ), officially the Macao Special Administrative Region of the People's Republic of China (MSAR), is a city and special administrative region of China in the western Pearl River Delta by the South China Sea. With a pop ...
,
Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...
,
Taipei Computer Association Taipei (), officially Taipei City, is the capital and a special municipality of the Republic of China (Taiwan). Located in Northern Taiwan, Taipei City is an enclave of the municipality of New Taipei City that sits about southwest of the ...
,
Unicode Consortium The Unicode Consortium (legally Unicode, Inc.) is a 501(c)(3) non-profit organization incorporated and based in Mountain View, California. Its primary purpose is to maintain and publish the Unicode Standard which was developed with the intenti ...
,
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
, and
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
. As of Unicode version 15.0, the IRG has been responsible for submitting several blocks of CJK unified ideographs and compatibility ideographs for encoding: *
CJK Unified Ideographs The Chinese, Japanese and Korean (CJK) scripts share a common background, collectively known as CJK characters. In the process called Han unification, the common (shared) characters were identified and named CJK Unified Ideographs. As of Unicode ...
(added in Unicode 1.0) *
CJK Unified Ideographs Extension A CJK Unified Ideographs Extension-A is a Unicode block A Unicode block is one of several contiguous ranges of numeric character codes (code points) of the Unicode character set that are defined by the Unicode Consortium for administrative and doc ...
(added in Unicode 3.0) *
CJK Unified Ideographs Extension B CJK Unified Ideographs Extension B is a Unicode block A Unicode block is one of several contiguous ranges of numeric character codes ( code points) of the Unicode character set that are defined by the Unicode Consortium for administrative and ...
(added in Unicode 3.1) *
CJK Unified Ideographs Extension C __FORCETOC__ CJK Unified Ideographs Extension C is a Unicode block containing rare and historic CJK ideographs for Chinese, Japanese, Korean, and Vietnamese. The block has dozens of ideographic variation sequences registered in the Unicode Ide ...
(added in Unicode 5.2) *
CJK Unified Ideographs Extension D CJK Unified Ideographs Extension D is a Unicode block A Unicode block is one of several contiguous ranges of numeric character codes ( code points) of the Unicode character set that are defined by the Unicode Consortium for administrative and d ...
(added in Unicode 6.0) *
CJK Unified Ideographs Extension E CJK Unified Ideographs Extension E is a Unicode block A Unicode block is one of several contiguous ranges of numeric character codes ( code points) of the Unicode character set that are defined by the Unicode Consortium for administrative and d ...
(added in Unicode 8.0) *
CJK Unified Ideographs Extension F CJK Unified Ideographs Extension F is a Unicode block containing rare and historic CJK ideographs for Chinese, Japanese, Korean, and Vietnamese, as well as more than a thousand Sawndip characters for writing the Zhuang language The Zhuang la ...
(added in Unicode 10.0) * CJK Unified Ideographs Extension G (added in Unicode 13.0) *
CJK Unified Ideographs Extension H __FORCETOC__ CJK Unified Ideographs Extension H is a Unicode block containing rare and historic CJK Unified Ideographs for Chinese, Japanese, Korean, Sawndip, and Vietnamese. Block History The following Unicode-related documents record the purpo ...
(added in Unicode 15.0) *
CJK Compatibility Ideographs CJK Compatibility Ideographs is a Unicode block created to contain Han characters that were encoded in multiple locations in other established character encodings, in addition to their CJK Unified Ideographs assignments, in order to retain roun ...
(added in Unicode 1.0) *
CJK Compatibility Ideographs Supplement CJK Compatibility Ideographs Supplement is a Unicode block containing Han characters used only for Round-trip format conversion, roundtrip compatibility mapping with planes 3, 4, 5, 6, 7, and 15 of CNS 11643-1992. Block History The following Un ...
(added in Unicode 3.1) Since 2015, proposed characters submitted by IRG member bodies have been processed in batches called "IRG Working Sets". Each working set undergoes several years of review by IRG experts before official submission of the working set to WG2 as a new block. Once accepted by WG2, the proposed block is processed according to the individual procedures followed by ISO/IEC JTC1 SC2 and the
Unicode Technical Committee The Unicode Consortium (legally Unicode, Inc.) is a 501(c)(3) non-profit organization incorporated and based in Mountain View, California. Its primary purpose is to maintain and publish the Unicode Standard which was developed with the intentio ...
(UTC). In the case of SC2, this involves balloting of ISO member bodies. The following working sets have been processed by IRG: * WS2015 became CJK Unified Ideographs Extension G (Unicode 13.0, 2020); * WS2017 became
CJK Unified Ideographs Extension H __FORCETOC__ CJK Unified Ideographs Extension H is a Unicode block containing rare and historic CJK Unified Ideographs for Chinese, Japanese, Korean, Sawndip, and Vietnamese. Block History The following Unicode-related documents record the purpo ...
(Unicode 15.0, 2022); * WS2021 may become CJK Unified Ideographs Extension I at a future date.


References


External links


IRG
homepage, including meeting documents and Working Set revisions
Working Set 2015
Online Review Tool
Working Set 2017
Online Review Tool
Working Set 2021
Online Review Tool {{Unicode navigation Unicode International Organization for Standardization Internationalization and localization