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.Dd July 20, 2021
.Dt FREF 1
.Os
.Sh NAME
.Nm fref
.Nd format references
.
.Sh SYNOPSIS
.Nm
.Op Fl l Ar lang
.
.Sh DESCRIPTION
.Pp
.Nm
is a
.Xr troff 1
preprocessor that formats reference lists.
It does not handle inline citations.
.Pp
Unlike
.Xr refer 1 ,
.Nm
does not re-arrange references.
They are inserted in the places they are specified in the
.Xr troff 1
source code.
.Pp
The
.Fl l
flag controls the language of certain strings, such as
.Dq ed. ,
.Dq pp. ,
and
.Dq and .
The following values are supported:
.Bl -tag -width xx -offset indent
.It Em en
English (default)
.It Em ru
Russian
.It Em sv
Swedish
.El
.
.Sh SYNTAX
.Pp
Lines beginning with
.Ql %
(percent) are treated as reference fields.
The percent sign is followed by a two-letter identifier,
signifying the type of field.
The field identifier is followed by a space or tab
and the contents of the field, spanning the rest of the line.
.Pp
Reference list entries are separated by any number of
non-field lines.
.Pp
The following fields are available:
.Bl -tag -width xxx -offset indent
.It Sy %ad
Access date
.It Sy %bo
Book
.It Sy %ci
City
.It Sy %da
Date (year)
.It Sy %ed
Editor
.It Sy %hr
Hypertext reference
.It Sy %is
Issuer, publisher
.It Sy %jo
Journal
.It Sy %la
Label
.It Sy %lc
Reference-specific language
.It Sy %no
TODO: Issue number
.It Sy %pg
Page number(s)
.It Sy %se
TODO: Series
.It Sy %ti
Title
.It Sy %tr
Translator
.It Sy %vo
Volume
.It Sy %xx
Extra information
.El
.Pp
Note that
.Nm
performs no special formatting of the
.Sy %au
field.
Thus, it should be specified as
.Dq "last name, first name" .
.
.Sh EXAMPLES
.Pp
The following
.Xr troff 1
source code
.Bd -literal -offset indent
\&.SH
References
\&.XP
%au Baudouin de Courtenay, J.
%da 1972
%ti The Difference between Phonetics and Psychophonetics
%bo A Baudouin de Courtenay Anthology
%ed T. A. Sebeok et al.
%tr Edward Stankiewicz
%ci Bloomington
%pu Indiana University Press
%xx Extra information
\&.XP
\&.\\" ...
.Ed
.Pp
results in the following output:
.Bd -literal -offset indent
\&.SH
References
\&.XP
Baudouin de Courtenay, J. (1972).
The Difference between Phonetics and Psychophonetics.
\\fIA Baudouin de Courtenay Anthology\\fP (ed. T. A. Sebeok et al.).
Trans. Edward Stankiewicz.
Bloomington: Indiana University Press.
Extra information.
\&.XP
\&.\\" ...
.Ed
.
.Sh SEE ALSO
.Pp
.Xr refer 1
.
.Sh AUTHORS
.Pp
.Nm
is written by John Ankarström
.Aq Mt "john (at) ankarstrom.se" .
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