'\"
'\" Copyright (c) 2025 Ashok P. Nadkarni.
'\"
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.TH unicode n "9.1" Tcl "Tcl Built-In Commands"
.so man.macros
.BS
.SH NAME
unicode \- Unicode character transforms
.SH SYNOPSIS
\fBunicode \fIfunction\fR ?\fIoptions\fR? \fIstring\fR
.BE
.SH DESCRIPTION
.PP
The command performs one of several Unicode character transformations, depending on
\fIfunction\fR which may take the values described below.
.\" METHOD: tonfc
.VS "TIP726"
.TP
\fBunicode tonfc\fR ?\fB-profile\fR \fIprofile\fR? \fIstring\fR
.VE "TIP726"
.
Returns \fIstring\fR normalized as per Unicode \fBNormalization Form C\fR (NFC).
.PP
.\" METHOD: tonfd
.VS "TIP726"
.TP
\fBunicode tonfd\fR ?\fB-profile\fR \fIprofile\fR? \fIstring\fR
.VE "TIP726"
.
Returns \fIstring\fR normalized as per Unicode \fBNormalization Form D\fR (NFD).
.PP
.\" METHOD: tonfkc
.VS "TIP726"
.TP
\fBunicode tonfkc\fR ?\fB-profile\fR \fIprofile\fR? \fIstring\fR
.VE "TIP726"
.
Returns \fIstring\fR normalized as per Unicode \fBNormalization Form KC\fR (NFKC).
.PP
.\" METHOD: tonfkd
.VS "TIP726"
.TP
\fBunicode tonfkd\fR ?\fB-profile\fR \fIprofile\fR? \fIstring\fR
.VE "TIP726"
.
Returns \fIstring\fR normalized as per Unicode \fBNormalization Form KD\fR (NFKD).
.PP
The normalization forms NFC, NFD, NFKC and NFKD referenced above are defined
in \fBSection 3.11\fR of the Unicode standard
(see https://www.unicode.org/versions/Unicode16.0.0/core-spec/chapter-3/).
.PP
The \fB-profile\fR option determines the command behavior in the presence
of conversion errors. The passed profile must be \fBstrict\fR or \fBreplace\fR.
See the \fBPROFILES\fR section in the documentation
of the \fBencoding\fR command for details on profiles.
.PP
.SH "SEE ALSO"
Tcl_UtfToNormalized(3)
.SH KEYWORDS
Unicode, normalize
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