UK-Source Ideographs documents the source references for the CJK Unified Ideographs that are submitted by the UK (United Kingdom) to the IRG (Ideographic Research Group) for inclusion in their working sets by providing the actual submissions. Such ideographs are referred to as UK-source ideographs, which are documented in Unicode Standard Annex #38 (UAX #38), Unicode Han Database (Unihan), as the kIRG_UKSource property.
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Document IRG N2107R2 (PDF), which was originally submitted as IRG N2107 prior to IRG Meeting #45, documents the 1,640 UK-source ideographs that were submitted for IRG Working Set 2015, 1,566 of which are encoded in CJK Unified Ideographs Extension G (Unicode Version 13.0). For purely legacy reasons, these 1,640 UK-source ideographs, along with 16 that were withdrawn in the first revision of IRG N2107, can also be found in Unicode Standard Annex #45 (UAX #45), U-Source Ideographs, as source references UK-01313 through UK-02968.
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Document IRG N2232R (PDF), which was originally submitted as IRG N2232 prior to IRG Meeting #49, documents the 1,000 UK-source ideographs that were submitted for IRG Working Set 2017, 917 of which are encoded in CJK Unified Ideographs Extension H (Unicode Version 15.0).
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Document IRG N2487 (PDF), which was submitted prior to IRG Meeting #57, documents the 1,000 UK-source ideographs that were submitted for IRG Working Set 2021, 906 of which are encoded in CJK Unified Ideographs Extension J (Unicode Version 17.0).
The above three documents each include the following two files as PDF attachments:
- A Microsoft Excel file that provides the per-ideograph attributes.
- A TrueType font that provides the representative glyphs for the UK-source ideographs, which are mapped from the PUA (Private Use Area) code points as specified in the Microsoft Excel file, the use of which is covered under the terms of the Arphic Public License (also see LICENSE).
Evidence images for documents IRG N2107R2 and IRG N2232R can be downloaded from the Latest Release as UKSourceEvidenceIRGN2107.pdf and UKSourceEvidenceIRGN2232.pdf, respectively. Click here to download a 398MB ZIP file that includes the evidence images for document IRG N2487.
All of the representative glyphs that correspond to the UK-source ideographs, which are mapped from their standardized code points, are available as a TrueType font, the use of which is covered under the terms of the Arphic Public License (also see LICENSE), and can be easily downloaded from the Latest Release.
The table below specifies the number of UK-source ideographs that have been encoded in CJK Unified Ideographs Extension blocks, either from submissions for IRG working sets or as horizontal extensions, and as of Unicode Version 17.0:
| Extension | Ideographs | Source |
|---|---|---|
| A | 3 | Horizontal extension |
| B | 12 | Horizontal extension |
| C | 1 | Horizontal extension |
| E | 2 | Horizontal extension |
| F | 2 | Horizontal extension |
| G | 1,566 | IRG Working Set 2015 |
| H | 917 | IRG Working Set 2017 |
| J | 906 | IRG Working Set 2021 |
The kIRG_UKSource.txt data file is an excerpt of the Unihan database Unihan_IRGSources.txt data file that includes only the 3,409 ideographs with a kIRG_UKSource property value.
UK submissions for current and future IRG working sets will be added to this repository as their are standardized in CJK Unified Ideographs extension blocks.
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