GB 18030-2022 has delete nine CJK Compatibility Ideographs are no longer required. but noto-cjk still has two unicode

[YanAnzouyijun]

Defect Report

GB 18030-2022 has delete nine CJK Compatibility Ideographs are no longer required. but noto-cjk still has two unicode, noto-cjk did not delete old unicode.

Title

GB 18030-2022 has delete nine CJK Compatibility Ideographs are no longer required. but noto-cjk still has two unicode.
noto-cjk did not delete old unicode.

Font

r Noto Sans CJK

GB 18030-2022 has delete old unicode in GB18030-2005:
such as 郎 (0xFD9C) in GB18030-2005 is U+F92C, and in GB18030-2022 is U+90DE .
but i had found a paper written by Dr. Ken Lunde regarding GB18030-2022: https://ken-lunde.medium.com/the-gb-18030-2022-standard-3d0ebaeb4132. he said that "Of course, there is no requirement for font implementations to remove these nine CJK Compatibility Ideographs. There is simply no longer a requirement to include them. I suspect that most font implementations will leave the glyphs and their mappings in place for the sake of backward compatibility".

a staff member in Standardization Institute said the font must delete old unicode ,otherwise Level 2 will not pass.

[medicalwei]

The same article from Dr. Ken Lunde suggests that it is just removed from the standard, but no requirement to remove the glyphs.

I would like to confirm it is not a requirement from GB 18030-2022 to remove these 9 glyphs from the fonts to be standard-compliant.

[chihchun]

Based on L2/22-274R: Disruptive Changes in GB 18030-2022,

• The GB 18030-2022 break existing content created, from 2005 to 2022 using those PUA characters. This includes content created using Unicode encoding as well as GB 18030 encoding.
• If removing nine CJK Compatibility Ideographs is the expectation enforced, then that will be in direct conflict with Unicode, which would deem such fonts to be conformant.

[punchcutter]

We are not removing the glyphs or any encodings.

[punchcutter]

When the GB 18030 2022 amendment is finalized we can look at everything again, but until then we can close this.