Ideographic Variation Database

Registrar:Dr Ken LUNDE (小林剣)

UTC CJK & Unihan Working Group  • Ideographic Research Group

The Ideographic Variation Database provides a registry for collections of unique variation sequences containing ideographs, allowing for standardized interchange according toUTS #37,Unicode Ideographic Variation Database.

This page records the successiveversions of the IVD, theregistered IVD collections, includes a note about the length of thereview period, and lists thesubmissions under review, if any.

Versions of the IVD

A new, cumulative, version of the IVD is created based on submissions that are reviewed and accepted. Versions are identified by the date of their release. Once released, a version is immutable.

The following table lists the successive versions of the IVD listed in reverse chronological order:

Version	Change
2025-07-14	Combined registration of the CAAPH collection and of sequences in that collection.
2022-09-13	Registration of additional sequences in the Adobe-Japan1 collection.
2020-11-06	Registration of additional sequences in the MSARG collection.
2017-12-12	Registration of additional sequences in the Adobe-Japan1 collection. Combined registration of the KRName collection and of sequences in that collection. Registration of additional sequences in the Moji_Joho collection.
2016-08-15	Combined registration of the MSARG collection and of sequences in that collection.
2014-05-16	Combined registration of the Moji_Joho collection and of sequences in that collection.
2012-03-02	Registration of additional sequences in the Adobe-Japan1 collection. Registration of additional sequences in the Hanyo-Denshi collection.
2010-11-14	Combined registration of the Hanyo-Denshi collection and of sequences in that collection.
2007-12-14	Combined registration of the Adobe-Japan1 collection and of sequences in that collection.

NOTE:Effective from the 2014-05-16 version of the IVD, the all-encompassing IVD_Charts.pdf file has been discontinued, and all future versions of the IVD will include only collection-specific glyph charts.

Registered IVD collections

The following table lists the registered IVD collections, how many sequences are registered in each, the date of the latest registration, the date of the first registration, and their historical PRI numbers:

IVD Collection	Registered Sequences	Date of Latest Registration	Date of First Registration	Historical PRI Numbers
Adobe-Japan1	14,684	2022-09-13	2007-12-14	98,108,183,349,456
CAAPH	198	2025-07-14	2025-07-14	521
Hanyo-Denshi	13,045	2012-03-02	2010-11-14	167,187
KRName	36	2017-12-12	2017-12-12	351
Moji_Joho	11,384	2017-12-12	2014-05-16	259,354
MSARG	154	2020-11-06	2016-08-15	326,418

Review period

Effective 2014-05-16, in order to allow sufficient time for larger submissions to be adequately reviewed, and in accordance with Sections 4.1 and 4.2 ofUTS #37 that state “…a review period ofat least 90 days,” all future submissions may be subject to a review period longer than 90 days. Submissions that include approximately 4,000 sequences or less will be subject to a 90-day review period. For larger submissions, and at the discretion of the IVD Registrar, 30 days may be added to the 90-day review period for approximately each 2,000 sequences above 4,000.

Submissions under review

There are currently no submissions under review.