*UK-Source Ideographs* documents the source references for the CJK Unified Ideographs that are submitted by the UK (*United Kingdom*) to the[IRG](http://appsrv.cse.cuhk.edu.hk/~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 is documented in Unicode Standard Annex#38 ([UAX#38](https://unicode.org/reports/tr38/)),*Unicode Han Database (Unihan)*, as the[*kIRG_UKSource*](https://unicode.org/reports/tr38/#kIRG_UKSource) property.

*[IRG N2107R2](https://github.com/unicode-org/uk-source-ideographs/raw/main/IRGN2107R2.pdf) (PDF), which was originally submitted as IRG N2107 for[IRG#45](http://appsrv.cse.cuhk.edu.hk/~irg/irg/irg45/IRG45.htm), 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](https://www.unicode.org/Public/13.0.0/charts/blocks/U30000.pdf) ([Unicode Version 13.0](https://www.unicode.org/versions/Unicode13.0.0/)). The per-ideograph attributes can be found in an Excel file that is a PDF attachment. For purely legacy reasons, these 1,640 UK-source ideographs, along with 16 that were withdrawn in the first revision of IRG N2107, can also be found in Unicode Standard Annex#45 ([UAX#45](https://unicode.org/reports/tr45/)),*U-Source Ideographs*, as source references UK-01313 through UK-02968.

*[IRG N2107R2](https://github.com/unicode-org/uk-source-ideographs/raw/main/IRGN2107R2.pdf) (PDF), which was originally submitted as IRG N2107 for[IRG#45](http://appsrv.cse.cuhk.edu.hk/~irg/irg/irg45/IRG45.htm), 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](https://unicode.org/charts/PDF/U30000.pdf) ([Unicode Version 13.0](https://www.unicode.org/versions/Unicode13.0.0/)). The per-ideograph attributes can be found in an Excel file that is a PDF attachment. For purely legacy reasons, these 1,640 UK-source ideographs, along with 16 that were withdrawn in the first revision of IRG N2107, can also be found in Unicode Standard Annex#45 ([UAX#45](https://unicode.org/reports/tr45/)),*U-Source Ideographs*, as source references UK-01313 through UK-02968.

*[IRG N2232R](https://github.com/unicode-org/uk-source-ideographs/raw/main/IRGN2232R.pdf) (PDF), which was originally submitted as IRG N2232 for[IRG#49](http://appsrv.cse.cuhk.edu.hk/~irg/irg/irg49/IRG49.htm), 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](https://unicode.org/charts/PDF/U31350.pdf) ([Unicode Version 15.0](https://www.unicode.org/versions/Unicode15.0.0/)). The per-ideograph attributes can be found in an Excel file that is a PDF attachment.

Evidence images for both IRG N2107R2 and IRG N2232R are easily downloaded from the[Latest Release](https://github.com/unicode-org/uk-source-ideographs/releases/latest/) as*UKSourceEvidence.pdf*, which is a 1,236-page bookmarked PDF.

The glyphs that correspond to the UK-source ideographs are available in TrueType (TTF) format, their use is covered under the terms of the[Arphic Public License](https://ftp.gnu.org/gnu/non-gnu/chinese-fonts-truetype/LICENSE) (also see*LICENSE.md*), and can be easily downloaded from the[Latest Release](https://github.com/unicode-org/uk-source-ideographs/releases/latest/). For*IRGN2232.ttf*, the glyphs are mapped from PUA (*Private Use Area*) code points as specified in the Excel file that is attached to*IRGN2232R.pdf*.

The table below indicates the number of UK-Source ideographs that have been encoded in CJK Unified Ideographs**Extension** blocks as horizontal extensions and as of[Unicode Version 15.0](https://www.unicode.org/versions/Unicode15.0.0/):

**Extension** |**Ideographs**

--- | ---

[A](https://unicode.org/charts/PDF/U3400.pdf) | 3

[B](https://unicode.org/charts/PDF/U20000.pdf) | 12

[C](https://unicode.org/charts/PDF/U2A700.pdf) | 1

[E](https://unicode.org/charts/PDF/U2B820.pdf) | 2

[F](https://unicode.org/charts/PDF/U2CEB0.pdf) | 2

The table below indicates the number of UK-Source ideographs that have been encoded in CJK Unified Ideographs**Extension** blocks, either from IRG working sets or as horizontal extensions, and as of[Unicode Version 15.0](https://www.unicode.org/versions/Unicode15.0.0/):

**Extension** |**Ideographs** |**Source**

--- | --- | ---

[A](https://unicode.org/charts/PDF/U3400.pdf) | 3 | Horizontal extension

[B](https://unicode.org/charts/PDF/U20000.pdf) | 12 | Horizontal extension

[C](https://unicode.org/charts/PDF/U2A700.pdf) | 1 | Horizontal extension

D |*none*

[E](https://unicode.org/charts/PDF/U2B820.pdf) | 2 | Horizontal extension

[F](https://unicode.org/charts/PDF/U2CEB0.pdf) | 2 | Horizontal extension

[G](https://unicode.org/charts/PDF/U30000.pdf) | 1,566 | IRG Working Set 2015

[H](https://unicode.org/charts/PDF/U31350.pdf) | 917 | IRG Working Set 2017

UK submissions to future IRG working sets will be added to this repository as appropriate.