Rotational key rules

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Rotational keys, or "rotas" are combinations of one or more keys pressed in sequence to produce a character or letter output, following the sequences defined by Keyman rules, and they will always end up back to the first letter as part of a rotation.

To easily understand this, check and test the rules:

begin Unicode > use(main)
group(main) using keys

'c' + 'c' > 'č'             c caron
'č' + 'c' > 'cc'              c double c
'cc' + 'c' > 'čč'              c double c caron
'čč' + 'c' > 'c'              c back to c

The rule below allows the combination of a vowel with one of the diacritics (',`,^) to output the vowel and an accent (à, ô, ú). After that, the rotation will happen if one of the specified diacritics is typed. Only then will it revert back to the initial vowel.

store(vowel)  'aeiou'
store(acute)  'áéíóú'
store(grave)  'àèìòù'
store(circum) 'âêîôû'

any(vowel) + "'" > index(acute, 1)
any(acute) + "'" > index(vowel, 1)     c Point of rotation

any(vowel) + "`" > index(grave, 1)
any(grave) + "`" > index(vowel, 1)     c Point of rotation

any(vowel)  + "^" > index(circum, 1)
any(circum) + "^" > index(vowel, 1)    c Point of rotation

Now, this rule is a bit different. The vowel directly changes to the accented vowel when / is typed; it will do this four times and then reverts back to the initial vowel.

any(vowel) + '/' > index(acute, 1)
any(acute) + '/' > index(grave, 1)
any(grave) + '/' > index(circum, 1)
any(circum) + '/' > index(vowel, 1)

Some keyboards with rotas

• Xinaliq Keyboard
• Khmer (SIL) Keyboard
• Cipher Music (SIL) keyboard

See also

• store()
• any()
• index()