Big5 Text Codec

The Big5 codec provides conversion to and from the Big5 encoding. The code was originally contributed by Ming-Che Chuang <> for the Big-5+ encoding, and was included in Qt with the author's permission, and the grateful thanks of the Qt team. (Note: Ming-Che's code is QPL'd, as per an mail to

However, since Big-5+ was never formally approved, and was never used by anyone, the Taiwan Free Software community and the Li18nux Big5 Standard Subgroup agree that the de-facto standard Big5-ETen (zh_TW.Big5 or zh_TW.TW-Big5) be used instead.

The Big5 is currently implemented as a pure subset of the Big5-HKSCS codec, so more fine-tuning is needed to make it identical to the standard Big5 mapping as determined by Li18nux-Big5. See for the draft Big5 (2002) standard.

James Su <> <> generated the Big5-HKSCS-to-Unicode tables with a very space-efficient algorithm. He generously donated his code to glibc in May 2002. Subsequently, James has kindly allowed Anthony Fok <> <> to adapt the code for Qt.

See also Text Codecs: Big5, Big5-HKSCS.

© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.