Ranges written with two marks
range-notation-consistencyon by default (info)Japanese / English
Ranges written with two marks in one document, such as "10–20" and "10-20"
Example
How to fix
Match the mark the rest of the document uses. If the team has decided, write it in the style guide.
Why it matters
When one document writes ranges with two marks ("10–20" and "10-20", "10〜20" and "10-20"), the reader wonders whether the difference means something, a hyphen being also a minus sign or part of a number. It happens when texts are pasted together or typed by different people. chaff does not decide which mark is right; it points at the one the document uses less.
What it does not flag
Runs with more numbers around them (the date 2026-10-02, phone numbers, times such as 10:00–12:00, versions) and pairs whose end is smaller than the start (a score of 3-2, a postcode such as 100-0001), and Japanese document numbers written against a kanji word (直資4－5ほか) are not read as ranges. Words ("10 to 20") are not compared. When the less common mark is over a third of the ranges, or the two are equally common, the document is read as using both on purpose. Code is not read.
Turning it off or relaxing it
Technical details
- Layer
- L2
- Status
- stable
- Severity
- info
- Languages
- Japanese and English
- Suited to
- business, technical, blog, legal, docs, academic, literature, speech
Levels
Set a level for this rule under rules in chaff.yaml. With nothing set, it runs at the level its genre gives it (see By genre below).
| strict | reported when the less common mark is 49% of the ranges or less |
|---|---|
| normal | reported when the less common mark is 34% of the ranges or less |
| relaxed | reported when the less common mark is 20% of the ranges or less |
By genre
- Runs by default in
- technical/spec, technical/readme, blog/tech, blog/essay, blog/owned-media, business/proposal, business/report, business/email, business/press-release, business/meeting-notes, legal/contract, legal/statute, legal/judgment, legal/patent, docs/manual, docs/faq, docs/glossary, academic/paper, literature/fiction, literature/essay, literature/poetry, literature/play, speech/address, speech/transcript
Message
The range "{written}" here, where the document usually writes ranges like "{usual}" ({count} of {of})
This page is built from the rule's definition file:packages/chaff/rules/range-notation-consistency.yaml