## Function: SB-UNICODE:UPPERCASE
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> Returns the full uppercase of STRING according to the Unicode standard.
> The result is not guaranteed to have the same length as the input. If :LOCALE
> is NIL, no language-specific case transformations are applied. If :LOCALE is a
> keyword representing a two-letter ISO country code, the case transforms of that
> locale are used. If :LOCALE is T, the user's current locale is used (Unix and
> Win32 only).

### Lambda list
```cl
(string &key sb-unicode::locale)
```