•UCS — Unicode•UCS Y converts characters ↔ exact integer code points, preserving shape.
•UCS 'ABC' ⍝ 65x 66x 67x
•UCS 65 66 67 ⍝ 'ABC'
E•UCS Y encodes characters or decodes integer units. E is 'UTF-8', 'UTF-16' or 'UTF-32'.
'UTF-8'•UCS 'é' ⍝ 195x 169x
'UTF-8'•UCS 195 169 ⍝ ,'é'
Encoding forms take vectors; scalars become singletons. DOMAIN: invalid code point or malformed encoding.