3 Terms and definitions [intro.defs]

3.41 [defns.regex.primary.equivalence.class]primary equivalence class

⟨regular expression⟩ set of one or more characters ([defns.character]) which share the same primary sort key: that is the sort key weighting that depends only upon character shape, and not accents, case, or locale-specific tailorings

3 Terms and definitions [intro.defs]

3.41[defns.regex.primary.equivalence.class]primary equivalence class

3.41 [defns.regex.primary.equivalence.class]primary equivalence class