UAX #14 rev. 57, Section 10: the example “13.01) [^NU] × CL” does not match LB13 or the test rules

The numbering example in Section 10 gives “13.01) [^NU] × CL” and “13.02) × EX”. LB13 has no condition on the preceding class, and the test rules number the parts “13.01) × EX” and “13.02) × CL”. The example swaps the numbers and adds a condition that no rule has; revision 55 has the same example.

Consequence

The number 1 (U+0031) followed by U+007D RIGHT CURLY BRACKET, position 1: LB13 gives no break; the example’s rule would allow one.

Proposed correction

Read “13.01) × EX” and “13.02) × CL”, as in the test rules.

Issued by

Unicode Consortium — Unicode Technical Committee

Act

UAX #14 revision 57 (Unicode 18.0.0)

Place

Section 10, example of test rule numbering

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.

13.01) [^NU] × CL

13.02) × EX

LB13 Do not break before ‘]’ or ‘!’ or ‘/’, even after spaces. × CL × CP × EX × SY

How to check it without Arxo's tools

1. Open UAX #14 revision 57 (Unicode 18.0.0), Unicode Consortium and find Section 10, example of test rule numbering. 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 (e-mail)

Cite this record

Arxo Law, Arxo Findings Register, ARXO-2026-0460, https://arxo.io/findings/ARXO-2026-0460/ (status as of 2026-10-31). Data: ARXO-2026-0460.json.