UAX #14 rev. 57, Section 5.1 class AL: format characters listed as AL are Line_Break=NU in the data

The class AL description lists U+0600..U+0604, U+06DD and U+110BD among the format characters of class AL. LineBreak.txt 18.0.0 gives them Line_Break=NU since Unicode 15.1 (UTC action item 176-A81), and the NU description does not mention them. The table was not updated; revision 55 has the same table.

Consequence

U+0061, U+0020 SPACE, U+002E FULL STOP, U+0600 ARABIC NUMBER SIGN, position 2: as NU (data) LB15c gives a break before the full stop; as AL (the table) LB15d gives none. Published implementations split between the two readings.

Proposed correction

Move the rows for U+0600..U+0604, U+06DD and U+110BD from the AL table to the NU description.

Issued by

Unicode Consortium — Unicode Technical Committee

Act

UAX #14 revision 57 (Unicode 18.0.0)

Place

Section 5.1, class AL

Record

Discrepancy

Class

Text of the act

Where it arose

The text of the act

Arxo's conclusion

Confirmed

Official text

Unchanged at last check

Last checked

2026-10-31

Evidence

Contradiction within the text. Quotations are verbatim from the official material; translations are ours and marked.

0600..0604 | ARABIC NUMBER SIGN..ARABIC SIGN SAMVAT

06DD | ARABIC END OF AYAH

110BD | KAITHI NUMBER SIGN

How to check it without Arxo's tools

1. Open UAX #14 revision 57 (Unicode 18.0.0), Unicode Consortium and find Section 5.1, class AL. Compare the text with the quotation above. A copy is kept in this register: 296df5332aefe695-tr14-57.html (SHA-256 296df5332aefe695b4951b511288b118bc6a7b43db7fadfd60f6062096acc7c0, copy of the official file).
2. The finding holds if the quoted passages read as shown and the comparison gives the result stated at the top of this page. If it does not, write to us with the record ID.

How this finding was made

AI agents read the annexes and the data files and compared them; the examples were run through published implementations. An AI coordinator checked each place against the full annex and the trackers, and two further AI models checked the report before filing.

Responsible institutions

• Unicode Consortium — publishes the annex and the Unicode Character Database

Reported to

Responses

No response recorded.

History

1. 2026-10-31Confirmed by Arxo
2. 2026-10-31Entered in the register
3. 2026-10-31Reported to Unicode Consortium (web form)

Cite this record

Arxo Law, Arxo Findings Register, ARXO-2026-0456, https://arxo.io/findings/ARXO-2026-0456/ (status as of 2026-10-31). Data: ARXO-2026-0456.json.