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Ideographic Variation Database

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

This page records the successive versions of the IVD, provides the review instructions, includes a note about the length of the review period, and lists the submissions 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
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 retired, and all future versions of the IVD will include only collection-specific glyph charts.

Review instructions

Reviewers are encouraged to comment on any aspect of a submission, but more particularly on:

  • whether the intent of a proposed collection is appropriately described
  • whether the glyphic subset corresponding to a proposed sequence is indeed a glyphic subset of the base character for the sequence
  • whether the proposed sequences are congruent with the scope of their collection, or whether a new collection may be more appropriate

All comments should be sent via the Contact Form, which will be forwarded to the submitter. The content of a submission may be adjusted during the review period to account for the comments received.

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 of UTS #37 that state "…a review period of at 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.