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New version of HK Supplementary Character Set released by Government
31 - 12 - 2001



The Information Technology Services Department (ITSD) and the Official Languages Agency (OLA) released a new version of the Hong Kong Supplementary Character Set (HKSCS) today (December 31).

The HKSCS-2001 contains 116 more Chinese characters that are used on computers in the Hong Kong Special Administrative Region (HKSAR) in addition to those contained in the HKSCS which was published in 1999.

Jointly developed by the Government and the Chinese Language Interface Advisory Committee (CLIAC), the HKSCS-2001 also technically aligns with the latest version of the ISO 10646 standard, namely ISO/IEC 10646-2:2001, published by the International Organization for Standardization (ISO) in November 2001.

A spokesman for ITSD said today, "To store data on computers and conduct electronic communications, the data must be encoded in accordance with a pre-defined coding scheme."

"Currently, there are different schemes for encoding data in Chinese, such as the Big-5, Guo Biao and the ISO 10646 standard."

"But these coding schemes are unable to cover all the special Chinese characters used in the HKSAR which include names of persons and places, and the Cantonese dialect."

"To use such locally specific Chinese characters, computer users may create such characters by defining the characters in the user-defined area of the coding schemes employed on their computers."

"Such practice may not have much impact on the operation of stand-alone computers. However, it will result in distortion of information when electronic communication and data exchange in Chinese are conducted across connected computers because the user-defined characters created on one computer may not be recognisable by other computers," he said.

In order to facilitate computer users to conduct electronic communications in Chinese, the Government has developed an open and common Chinese language interface for the HKSAR under the "Digital 21" Strategy for IT development.

A pivotal element of this open and common Chinese language interface is the adoption of the ISO 10646 coding standard and the HKSCS so as to address the problems arising from the existence of different coding standards and insufficient characters in some Chinese character sets used on computers.

ISO 10646 is an international coding standard developed by the ISO. It embraces characters used in major languages in the world including traditional and simplified Chinese characters.

In 1999, the Government in collaboration with the CLIAC collected Chinese characters that were used on computers but not yet included in the Big-5 coding scheme from various sectors of the community including Government. The HKSCS was published in the same year based on the information so collected.

Characters contained in the HKSCS were submitted by the Government to the ISO for inclusion in the ISO 10646 international coding standard. Of the 4 702 characters in the HKSCS, 4 677 have been included in the ISO 10646 standard.

Recognising the need for the public and government departments to include new characters into the HKSCS from time to time, the Government worked with CLIAC and published the procedures and principles for inclusion of new characters in the HKSCS in April 2000.

The CLIAC meets regularly to consider applications for inclusion of characters in the HKSCS. Once approved, the new HKSCS characters will be submitted to the Ideographic Rapporteur Group under the ISO for consideration for inclusion in future releases of the ISO 10646 standard.

So far, the CLIAC has accepted 116 new characters for adding onto the 4 702 characters of the original HKSCS, thus bringing the total number of characters contained in the HKSCS-2001 to 4 818.

Technical documents, reference fonts and input software of the HKSCS-2001 are now available on the "Digital 21" web site ( www.digital21.gov.hk/eng/structure/struct_stand.html ) for free downloading and reference by members of the public.

Details of the CLIAC and the common Chinese language interface are also available on the "Digital 21" web site for public reference.



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