- textual-upcase textualprocedure
- textual-downcase textualprocedure
- textual-foldcase textualprocedure
- textual-titlecase textualprocedure
These procedures return the text obtained by applying Unicode's full uppercasing, lowercasing, case-folding, or title-casing algorithms to their argument. In some cases, the length of the result may be different from the length of the argument. Note that language-sensitive mappings and foldings are not used.