Seth Woolley's Man Viewer

refer(1) - refer - preprocess bibliographic references for groff - man 1 refer

([section] manual, -k keyword, -K [section] search, -f whatis)
man plain no title

REFER(1)                                                              REFER(1)

       refer - preprocess bibliographic references for groff(1,7)

       refer [ -benvCPRS ] [ -an ] [ -cfields ] [ -fn ] [ -ifields ]
             [ -kfield ] [ -lm,n ] [ -pfilename ] [ -sfields ] [ -tn ]
             [ -Bfield.macro ] [ filename... ]

       It is possible to have whitespace between a command line option and its

       This file(1,n) documents the GNU version(1,3,5) of refer,  which  is  part  of  the
       groff(1,7)  document  formatting system.  refer copies the contents of file-
       name... to the standard output, except that lines  between  .[  and  .]
       are  interpreted as citations, and lines between .R1 and .R2 are inter-
       preted as commands about how citations are to be processed.

       Each citation specifies a reference.  The citation can specify a refer-
       ence  that  is contained in(1,8) a bibliographic database by giving a set(7,n,1 builtins) of
       keywords that only that reference contains.  Alternatively it can spec-
       ify a reference by supplying a database record in(1,8) the citation.  A com-
       bination of these alternatives is also possible.

       For each citation, refer can produce a mark in(1,8)  the  text.   This  mark
       consists  of  some  label which can be separated from the text and from
       other labels in(1,8) various ways.  For each reference it also outputs groff(1,7)
       commands  that  can  be  used by a macro package to produce a formatted
       reference for each citation.  The output of  refer  must  therefore  be
       processed  using  a suitable macro package.  The -ms and -me macros are
       both suitable.  The commands to format a citation's  reference  can  be
       output immediately after the citation, or the references may be accumu-
       lated, and the commands output at some later point.  If the  references
       are  accumulated,  then  multiple  citations of the same reference will
       produce a single formatted reference.

       The interpretation of lines between .R1 and .R2 as commands  is  a  new
       feature  of  GNU refer.  Documents making use of this feature can still
       be processed by Unix refer just by adding the lines

              .de R1
              .ig R2
       to the beginning of the document.  This  will  cause  troff  to  ignore
       everything  between  .R1 and .R2.  The effect of some commands can also
       be achieved by options.  These options are supported mainly for compat-
       ibility  with  Unix  refer.   It is usually more convenient to use com-

       refer generates .lf lines so that filenames and line  numbers  in(1,8)  mes-
       sages  produced  by commands that read(2,n,1 builtins) refer output will be correct; it
       also interprets lines beginning with .lf so  that  filenames  and  line
       numbers in(1,8) the messages and .lf lines that it produces will be accurate
       even if(3,n) the input has been preprocessed by a command such as soelim(1).

       Most  options  are  equivalent  to commands (for a description of these
       commands see the Commands subsection):

       -b     no-label-in-text; no-label-in-reference

       -e     accumulate

       -n     no-default-database

       -C     compatible

       -P     move-punctuation

       -S     label "(A.n|Q) ', ' (D.y|D)"; bracket-label " (" ) "; "

       -an    reverse An

              capitalize fields

       -fn    label %n

              search-ignore fields

       -k     label L~%a

              label field~%a

       -l     label A.nD.y%a

       -lm    label A.n+mD.y%a

       -l,n   label A.nD.y-n%a

       -lm,n  label A.n+mD.y-n%a

              database filename

       -sspec sort(1,3) spec

       -tn    search-truncate n

       These options are equivalent to the following commands with  the  addi-
       tion  that the filenames specified on the command line are processed as
       if(3,n) they were arguments to the bibliography command instead  of  in(1,8)  the
       normal way:

       -B     annotate X AP; no-label-in-reference

              annotate field macro; no-label-in-reference

       The following options have no equivalent commands:

       -v     Print the version(1,3,5) number.

       -R     Don't recognize lines beginning with .R1/.R2.

   Bibliographic databases
       The  bibliographic  database is a text file(1,n) consisting of records sepa-
       rated by one or more blank lines.  Within each record fields start with
       a  %  at  the beginning of a line.  Each field has a one character name
       that immediately follows the %.  It is best to use only upper and lower
       case  letters for the names of fields.  The name of the field should be
       followed by exactly one space, and then by the contents of  the  field.
       Empty fields are ignored.  The conventional meaning of each field is as

       A      The name of an author.  If the name contains a title such as Jr.
              at  the  end,  it  should  be  separated from the last name by a
              comma.  There can be multiple occurrences of the A  field.   The
              order  is  significant.  It is a good idea always to supply an A
              field or a Q field.

       B      For an article that is part of a book, the title of the book.

       C      The place (city) of publication.

       D      The date of publication.  The year should be specified in(1,8)  full.
              If  the  month  is specified, the name rather than the number of
              the month should be used, but only the first three  letters  are
              required.   It is a good idea always to supply a D field; if(3,n) the
              date is unknown, a value such as in(1,8)  press  or  unknown  can  be

       E      For  an article that is part of a book, the name of an editor of
              the book.  Where the work has editors and no authors, the  names
              of the editors should be given as A fields and , (ed) or , (eds)
              should be appended to the last author.

       G      US Government ordering number.

       I      The publisher (issuer).

       J      For an article in(1,8) a journal, the name of the journal.

       K      Keywords to be used for searching.

       L      Label.

       N      Journal issue number.

       O      Other information.  This is usually printed at the  end  of  the

       P      Page number.  A range of pages can be specified as m-n.

       Q      The  name  of  the  author, if(3,n) the author is not a person.  This
              will only be used if(3,n) there are no A fields.  There can  only  be
              one Q field.

       R      Technical report number.

       S      Series name.

       T      Title.   For an article in(1,8) a book or journal, this should be the
              title of the article.

       V      Volume number of the journal or book.

       X      Annotation.

       For all fields except A and E, if(3,n) there is more than one occurrence  of
       a  particular field in(1,8) a record, only the last such field will be used.

       If accent strings are used, they should  follow  the  character  to  be
       accented.   This  means  that  the  AM  macro must be used with the -ms
       macros.  Accent strings should not be quoted: use  one  \  rather  than

       The format of a citation is
              flags keywords

       The opening-text, closing-text and flags components are optional.  Only
       one of the keywords and fields components need be specified.

       The keywords component says to search the bibliographic databases for a
       reference  that  contains all the words in(1,8) keywords.  It is an error(8,n) if(3,n)
       more than one reference if(3,n) found.

       The fields components specifies additional fields to replace or supple-
       ment those specified in(1,8) the reference.  When references are being accu-
       mulated and the keywords component is non-empty, then additional fields
       should be specified only on the first occasion that a particular refer-
       ence is cited, and will apply to all citations of that reference.

       The opening-text and closing-text component  specifies  strings  to  be
       used  to  bracket  the  label  instead  of the strings specified in(1,8) the
       bracket-label command.  If either of these components is non-empty, the
       strings  specified  in(1,8) the bracket-label command will not be used; this
       behaviour can be altered using the [ and ] flags.   Note  that  leading
       and trailing spaces are significant for these components.

       The  flags  component  is a list of non-alphanumeric characters each of
       which modifies the treatment of this particular citation.   Unix  refer
       will  treat these flags as part of the keywords and so will ignore them
       since they are non-alphanumeric.  The  following  flags  are  currently

       #      This says to use the label specified by the short-label command,
              instead of that specified by the label  command.   If  no  short
              label  has been specified, the normal label will be used.  Typi-
              cally the short label is used with author-date labels  and  con-
              sists of only the date and possibly a disambiguating letter; the
              # is supposed to be suggestive of a numeric type of label.

       [      Precede opening-text with the  first  string(3,n)  specified  in(1,8)  the
              bracket-label command.

       ]      Follow  closing-text  with  the  second  string(3,n) specified in(1,8) the
              bracket-label command.

       One advantages of using the [ and ] flags  rather  than  including  the
       brackets  in(1,8)  opening-text  and closing-text is that you can change the
       style of bracket used in(1,8) the document just  by  changing  the  bracket-
       label  command.  Another advantage is that sorting and merging of cita-
       tions will not necessarily be inhibited if(3,n) the flags are used.

       If a label is to be inserted into the text, it will be attached to  the
       line  preceding  the  .[ line.  If there is no such line, then an extra
       line will be inserted before the .[ line and a warning will be given.

       There is no special notation for making a citation to  multiple  refer-
       ences.   Just  use  a  sequence  of  citations, one for each reference.
       Don't put anything between the citations.  The labels for all the cita-
       tions  will  be attached to the line preceding the first citation.  The
       labels may also be sorted or merged.  See the  description  of  the  <>
       label expression, and of the sort-adjacent-labels and abbreviate-label-
       ranges command.  A label will not be merged if(3,n) its citation has a  non-
       empty opening-text or closing-text.  However, the labels for a citation
       using the ] flag and without any closing-text immediately followed by a
       citation  using  the  [ flag and without any opening-text may be sorted
       and merged even though the first citation's opening-text or the  second
       citation's  closing-text  is  non-empty.   (If you wish to prevent this
       just make the first citation's closing-text \&.)

       Commands are contained between lines starting with .R1 and .R2.  Recog-
       nition  of  these  lines can be prevented by the -R option.  When a .R1
       line is recognized any accumulated references are flushed out.  Neither
       .R1 nor .R2 lines, nor anything between them is output.

       Commands  are separated by newlines or ;s.  # introduces a comment that
       extends to the end of the line (but  does  not  conceal  the  newline).
       Each command is broken up into words.  Words are separated by spaces or
       tabs.  A word that begins with " extends to the next " that is not fol-
       lowed  by another ".  If there is no such " the word extends to the end
       of the line.  Pairs of " in(1,8) a word beginning with " collapse to a  sin-
       gle  ".   Neither # nor ; are recognized inside "s.  A line can be con-
       tinued by ending it with \; this works everywhere except after a #.

       Each command name that is marked with * has an associated negative com-
       mand  no-name that undoes the effect of name.  For example, the no-sort
       command specifies that references should not be sorted.   The  negative
       commands take no arguments.

       In the following description each argument must be a single word; field
       is used for a single upper or lower case letter naming a field;  fields
       is used for a sequence of such letters; m and n are used for a non-neg-
       ative numbers; string(3,n) is used for an arbitrary string(3,n); filename is used
       for the name of a file.

       abbreviate* fields string1 string2 string3 string4
                                Abbreviate the first names of fields.  An ini-
                                tial letter will  be  separated  from  another
                                initial  letter by string1, from the last name
                                by string2, and from anything else (such as  a
                                von  or  de)  by  string3.  These default to a
                                period followed by a space.  In  a  hyphenated
                                first  name,  the initial of the first part of
                                the name will be separated from the hyphen  by
                                string4;   this  defaults  to  a  period.   No
                                attempt is made to handle any ambiguities that
                                might  result  from  abbreviation.   Names are
                                abbreviated before sorting  and  before  label

       abbreviate-label-ranges* string(3,n)
                                Three  or  more  adjacent labels that refer to
                                consecutive references will be abbreviated  to
                                a  label  consisting  of the first label, fol-
                                lowed by string(3,n) followed by  the  last  label.
                                This is mainly useful with numeric labels.  If
                                string(3,n) is omitted it defaults to -.

       accumulate*              Accumulate references instead of  writing  out
                                each  reference as it is encountered.  Accumu-
                                lated references will be written out  whenever
                                a reference of the form


                                is encountered, after all input files hve been
                                processed, and whenever  .R1  line  is  recog-

       annotate* field string(3,n)   field is an annotation; print it at the end of
                                the reference as a paragraph preceded  by  the


                                If  macro is omitted it will default to AP; if(3,n)
                                field is also omitted it will  default  to  X.
                                Only one field can be an annotation.

       articles string(3,n)...       string(3,n)...   are  definite  or indefinite arti-
                                cles, and should be ignored at  the  beginning
                                of  T  fields when sorting.  Initially, the, a
                                and an are recognized as articles.

       bibliography filename... Write out all the references contained in(1,8)  the
                                bibliographic databases filename...

       bracket-label string1 string2 string3
                                In  the  text, bracket each label with string1
                                and string2.  An occurrence of string2 immedi-
                                ately  followed by string1 will be turned into
                                string3.  The default behaviour is

                                       bracket-label \*([. \*(.] ", "

       capitalize fields        Convert fields to caps and small caps.

       compatible*              Recognize .R1 and .R2 even when followed by  a
                                character other than space or newline.

       database filename...     Search the bibliographic databases filename...
                                For each filename if(3,n) an index filename.i  cre-
                                ated  by  indxbib(1)  exists,  then it will be
                                searched instead; each index can cover  multi-
                                ple databases.

       date-as-label* string(3,n)    string(3,n)  is a label expression that specifies a
                                string(3,n) with which to replace the D field after
                                constructing the label.  See the Label expres-
                                sions subsection for a  description  of  label
                                expressions.  This command is useful if(3,n) you do
                                not want  explicit  labels  in(1,8)  the  reference
                                list, but instead want to handle any necessary
                                disambiguation by qualifying the date in(1,8)  some
                                way.   The  label used in(1,8) the text would typi-
                                cally be some combination of  the  author  and
                                date.   In  most cases you should also use the
                                no-label-in-reference command.  For example,

                                       date-as-label D.+yD.y%a*D.-y

                                would attach a disambiguating  letter  to  the
                                year part of the D field in(1,8) the reference.

       default-database*        The default database should be searched.  This
                                is the default behaviour, so the negative ver-
                                sion(1,3,5)  of  this  command is more useful.  refer
                                determines whether the default database should
                                be  searched  on  the  first  occasion that it
                                needs to do a search.  Thus a no-default-data-
                                base  command  must  be  given before then, in(1,8)
                                order to be effective.

       discard* fields          When the reference is read(2,n,1 builtins), fields  should  be
                                discarded;  no  string(3,n)  definitions for fields
                                will be output.  Initially, fields are XYZ.

       et-al* string(3,n) m n        Control use of et al in(1,8) the  evaluation  of  @
                                expressions in(1,8) label expressions.  If the num-
                                ber of  authors  needed  to  make  the  author
                                sequence unambiguous is u and the total number
                                of authors is t then the last t-u authors will
                                be replaced by string(3,n) provided that t-u is not
                                less(1,3) than m and t is not  less(1,3)  than  n.   The
                                default behaviour is

                                       et-al " et al" 2 3

       include filename         Include filename and interpret the contents as

       join-authors string1 string2 string3
                                This  says  how  authors  should   be   joined
                                together.  When there are exactly two authors,
                                they will be joined with string1.  When  there
                                are  more  than  two authors, all but the last
                                two will be joined with string2, and the  last
                                two  authors  will be joined with string3.  If
                                string3  is  omitted,  it  will   default   to
                                string1;  if(3,n)  string2  is also omitted it will
                                also default to string1.  For example,

                                       join-authors " and " ", " ", and "

                                will restore the default  method  for  joining

       label-in-reference*      When  outputting  the  reference,  define  the
                                string(3,n) [F to be the reference's  label.   This
                                is the default behaviour; so the negative ver-
                                sion(1,3,5) of this command is more useful.

       label-in-text*           For each reference output a label in(1,8) the text.
                                The label will be separated from the surround-
                                ing text as  described  in(1,8)  the  bracket-label
                                command.   This  is  the default behaviour; so
                                the negative version(1,3,5) of this command  is  more

       label string(3,n)             string(3,n) is a label expression describing how to
                                label each reference.

       separate-label-second-parts string(3,n)
                                When merging  two-part  labels,  separate  the
                                second part of the second label from the first
                                label with string(3,n).  See the description of the
                                <> label expression.

       move-punctuation*        In  the  text, move(3x,7,3x curs_move) any punctuation at the end
                                of line past the label.  It is usually a  good
                                idea to give this command unless you are using
                                superscripted numbers as labels.

       reverse* string(3,n)          Reverse the fields whose names are in(1,8)  string(3,n).
                                Each  field  name  can be followed by a number
                                which says how  many  such  fields  should  be
                                reversed.   If no number is given for a field,
                                all such fields will be reversed.

       search-ignore* fields    While searching  for  keys  in(1,8)  databases  for
                                which  no index exists, ignore the contents of
                                fields.  Initially, fields XYZ are ignored.

       search-truncate* n       Only require the first n characters of keys to
                                be  given.   In  effect  when  searching for a
                                given key words in(1,8) the database are  truncated
                                to the maximum of n and the length of the key.
                                Initially n is 6.

       short-label* string(3,n)      string(3,n) is a label expression that specifies an
                                alternative  (usually shorter) style of label.
                                This is used when the # flag is given  in(1,8)  the
                                citation.    When   using   author-date  style
                                labels, the identity of the author or  authors
                                is sometimes clear(1,3x,3x clrtobot) from the context, and so it
                                may be desirable to omit the author or authors
                                from  the label.  The short-label command will
                                typically be used to specify a label  contain-
                                ing  just a date and possibly a disambiguating

       sort(1,3)* string(3,n)             Sort references according to  string(3,n).   Refer-
                                ences   will   automatically  be  accumulated.
                                string(3,n) should be a list of field  names,  each
                                followed  by  a  number,  indicating  how many
                                fields with the name should be used for  sort-
                                ing.   +  can be used to indicate that all the
                                fields with the name should be used.   Also  .
                                can  be used to indicate the references should
                                be sorted using the (tentative)  label.   (The
                                Label  expressions  subsection  describes  the
                                concept of a tentative label.)

       sort-adjacent-labels*    Sort labels that  are  adjacent  in(1,8)  the  text
                                according  to  their position in(1,8) the reference
                                list.  This command should usually be given if(3,n)
                                the  abbreviate-label-ranges  command has been
                                given, or if(3,n) the label expression  contains  a
                                <>  expression.   This  will  have  no  effect
                                unless references are being accumulated.

   Label expressions
       Label expressions can be evaluated both normally and tentatively.   The
       result  of  normal evaluation is used for output.  The result of tenta-
       tive evaluation, called the tentative label,  is  used  to  gather  the
       information  that  normal  evaluation  needs to disambiguate the label.
       Label expressions specified by the date-as-label and  short-label  com-
       mands  are  not evaluated tentatively.  Normal and tentative evaluation
       are the same for all types of expression other than @, *, and % expres-
       sions.   The  description  below  applies  to normal evaluation, except
       where otherwise specified.

       field n
              The n-th part of field.  If n is omitted, it defaults to 1.

              The characters in(1,8) string(3,n) literally.

       @      All the authors joined as specified by the join-authors command.
              The  whole  of each author's name will be used.  However, if(3,n) the
              references are sorted by author (that is the sort(1,3)  specification
              starts  with A+), then authors' last names will be used instead,
              provided that this does not introduce  ambiguity,  and  also  an
              initial  subsequence  of  the authors may be used instead of all
              the authors, again provided that this does not introduce ambigu-
              ity.   The use of only the last name for the i-th author of some
              reference is considered to be ambiguous if(3,n) there is  some  other
              reference, such that the first i-1 authors of the references are
              the same, the i-th authors  are  not  the  same,  but  the  i-th
              authors'  last names are the same.  A proper initial subsequence
              of the sequence of authors for some reference is  considered  to
              be ambiguous if(3,n) there is a reference with some other sequence of
              authors which also has that subsequence as a proper initial sub-
              sequence.   When  an initial subsequence of authors is used, the
              remaining authors are replaced by the string(3,n)  specified  by  the
              et-al command; this command may also specify additional require-
              ments that must be met before  an  initial  subsequence  can  be
              used.   @ tentatively evaluates to a canonical representation of
              the authors, such that authors that compare equally for  sorting
              purpose will have the same representation.

       %I     The  serial  number  of the reference formatted according to the
              character following the %.  The serial number of a reference  is
              1  plus  the  number  of  earlier references with same tentative
              label as this reference.  These expressions tentatively evaluate
              to an empty string.

       expr(1,3,n)*  If  there  is another reference with the same tentative label as
              this reference, then expr(1,3,n), otherwise an empty string.  It tenta-
              tively evaluates to an empty string.

       expr(1,3,n)-n The  first (+) or last (-) n upper or lower case letters or dig-
              its of expr(1,3,n).  Troff special characters (such as \('a) count as a
              single  letter.   Accent  strings  are retained but do not count
              towards the total.

       expr(1,3,n).l expr(1,3,n) converted to lowercase.

       expr(1,3,n).u expr(1,3,n) converted to uppercase.

       expr(1,3,n).c expr(1,3,n) converted to caps and small caps.

       expr(1,3,n).r expr(1,3,n) reversed so that the last name is first.

       expr(1,3,n).a expr(1,3,n) with first names abbreviated.  Note that  fields  specified
              in(1,8)  the abbreviate command are abbreviated before any labels are
              evaluated.  Thus .a is useful only when you want a field  to  be
              abbreviated in(1,8) a label but not in(1,8) a reference.

       expr(1,3,n).y The year part of expr(1,3,n).

              The  part  of  expr(1,3,n)  before the year, or the whole of expr(1,3,n) if(3,n) it
              does not contain a year.

              The part of expr(1,3,n) after the year, or an empty string(3,n) if(3,n) expr(1,3,n) does
              not contain a year.

       expr(1,3,n).n The last name part of expr(1,3,n).

              expr1  except  that  if(3,n) the last character of expr1 is - then it
              will be replaced by expr2.

       expr1 expr2
              The concatenation of expr1 and expr2.

              If expr1 is non-empty then expr1 otherwise expr2.

              If expr1 is non-empty then expr2 otherwise an empty string.

              If expr1 is non-empty then expr2 otherwise expr3.

       <expr(1,3,n)> The label is in(1,8) two parts, which are  separated  by  expr(1,3,n).   Two
              adjacent  two-part labels which have the same first part will be
              merged by appending the second part of the second label onto the
              first  label  separated by the string(3,n) specified in(1,8) the separate-
              label-second-parts command (initially, a  comma  followed  by  a
              space);  the  resulting label will also be a two-part label with
              the same first part as before merging, and so additional  labels
              can  be  merged  into  it.   Note that it is permissible for the
              first part to be empty; this  maybe  desirable  for  expressions
              used in(1,8) the short-label command.

       (expr(1,3,n)) The same as expr(1,3,n).  Used for grouping.

       The  above  expressions  are  listed  in(1,8)  order  of precedence (highest
       first); & and | have the same precedence.

   Macro interface
       Each reference starts with a call to the macro ]-.  The string(3,n) [F  will
       be  defined to be the label for this reference, unless the no-label-in-
       reference command has been given.   There  then  follows  a  series  of
       string(3,n)  definitions, one for each field: string(3,n) [X corresponds to field
       X.  The number register [P is set(7,n,1 builtins) to 1 if(3,n) the P field contains a  range
       of pages.  The [T, [A and [O number registers are set(7,n,1 builtins) to 1 according as
       the T, A and O fields end with one of the characters .?!.  The [E  num-
       ber  register  will be set(7,n,1 builtins) to 1 if(3,n) the [E string(3,n) contains more than one
       name.  The reference is followed by a call to the ][ macro.  The  first
       argument to this macro gives a number representing the type of the ref-
       erence.  If a reference contains a J field, it will  be  classified  as
       type  1,  otherwise if(3,n) it contains a B field, it will type 3, otherwise
       if(3,n) it contains a G or R field it will be type 4, otherwise if(3,n)  contains
       a  I  field it will be type 2, otherwise it will be type 0.  The second
       argument is a symbolic name for the type: other, journal-article, book,
       article-in-book  or  tech-report.   Groups of references that have been
       accumulated or are produced by the bibliography command are preceded by
       a call to the ]< macro and followed by a call to the ]> macro.

       /usr/dict/papers/Ind  Default database.

       file(1,n).i                Index files.

       REFER  If set(7,n,1 builtins), overrides the default database.

       indxbib(1), lookbib(1), lkbib(1)

       In  label  expressions, <> expressions are ignored inside .char expres-

Groff Version 1.19.1            16 January 2003                       REFER(1)

References for this manual (incoming links)