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NAME

       tnc - TDF notation compiler

SYNOPSIS

       tnc [ options ] input-file [ output-file ]

DESCRIPTION

       tnc  translates TDF capsules to and from text.  It has two input modes,
       read and decode.  In the first, which is default, input-file is a  file
       containing TDF text.  In the second input-file is a TDF capsule.  There
       are also two output mode, encode and write.  In  the  first,  which  is
       default,  a  TDF  capsule  is written to output-file In the second, TDF
       text is written to output-file.  If the output-file argument is absent,
       the standard output is used instead.

       Combination  of  these  modes  give four actions: text to TDF (which is
       default), TDF to text, text to text, and TDF  to  TDF.   The  last  two
       actions  are not precise identities, but they do give equivalent files.
       The TDF pretty-printer, disp(1), provides a more sophisticated  TDF  to
       text  translator,  although  its  output cannot be used as the input to
       tnc.

       The form of the TDF text format and more information about tnc  can  be
       found in the document The TDF Notation Compiler.

OPTIONS

       -c or -cv or -check
              Specifies that tnc should apply extra checks to input-file.  For
              example, simple shape checking is  applied.   These  checks  are
              more  efficient  in  read  mode than in decode mode.  If the -cv
              option is used in write mode, all the information  gleaned  from
              the shape checking appears in output-file.

       -d or -decode
              Specifies  that  tnc  should  be  in decode mode.  That is, that
              input-file is a TDF capsule.

       -e or -encode
              Specifies that tnc should be in  encode  mode.   That  is,  that
              output-file is a TDF capsule.

       -eval  Specifies  that  tnc  should  simplify  its  input by evaluating
              constant expressions as far as possible.

       -expand
              Specifies that tnc should expand  its  input  by  replacing  all
              applications of defined tokens by the token definition.

       -f or -func
              Causes  tnc  to  use  its alternative, functional, form for both
              input and output.  The options -func_in  and  -func_out  may  be
              used to change the input and the output independently.

       -help subject ...
              Makes tnc print its help message on the given subject(s).  If no
              subject is given, or the subject is all, all the  help  messages
              are printed.

       -Idir  Adds  the  directory  dir to the search path used by tnc to find
              included files in read mode.

       -l or -lib
              In decode mode, specifies that input-file is not a TDF  capsule,
              but  a TDF library.  All the capsules comprising the library are
              decoded.

       -Lprefix
              Causes tnc to  treat  any  external  identifiers  starting  with
              prefix to be treated as if they were declare local.

       -o output-file
              Gives an alternative method of specifying the output file.

       -p or -print
              Specifies  that  tnc  should be in decode and write modes.  That
              is, that input-file is a  TDF  capsule  and  output-file  should
              consist  of  TDF text.  This option makes tnc into a TDF pretty-
              printer.

       -q     Causes tnc not to check the consistency of multiple tag or token
              definitions.

       -r or -read
              Specifies that tnc should be in read mode.  That is, that input-
              file should consist of TDF text.

       -t or -tsimp
              Specifies that tnc should expand  its  input  by  replacing  all
              applications  of  defined  tokens by the token definition and by
              evaluating constant expressions as far  as  possible.   This  is
              equivalent to -expand -eval.

       -V     In  write  mode,  specifies  that  the  output  should be in the
              "verbose" form, with no shorthand forms.

       -version
              Makes tnc print its version number and the version  of  the  TDF
              specification it supports.

       -w or -write
              Specifies  that  tnc  should  be  in  write mode.  That is, that
              output-file should consist of TDF text.

SEE ALSO

       disp(1), tcc(1).

                                                                        tnc(1)