WEB(1)                      UNIX System V(5/27/90)                       WEB(1)


NAME
      tangle, weave - translate WEB to Pascal and/or TeX

SYNOPSIS
      tangle webfile[.web] [changefile[.ch]]
      weave [-x] webfile[.web] [changefile[.ch]]

DESCRIPTION
      The tangle program converts a WEB source document into a Pascal program
      that may be compiled in the usual way with the on-line Pascal compiler
      (e.g., pc(1)).  The output file is all in lower case and packed into
      lines of 72 characters or less, with the only concession to readability
      being the termination of lines at semicolons when this can be done
      conveniently.

      The WEB language allows you to prepare a single document containing all
      the information that is needed both to produce a compilable Pascal
      program and to produce a well-formatted document describing the program
      in as much detail as the writer may desire.  The user of WEB must be
      familiar with both TeX and Pascal.  WEB also provides a relatively
      simple, although adequate, macro facility that permits a Pascal program
      to be written in small easily-understood modules.

      The command line should have either one or two names on it.  The first is
      taken as the WEB file (and .web is added if there is no extension).  If
      there is another name, it is a change file (and .ch is added if there is
      no extension).  The change file overrides parts of the WEB file, as
      described in the WEB system documentation.

      The output files are a Pascal file and a string pool file, whose names
      are formed by adding .p and .pool respectively to the root of the WEB
      file name.

      The weave program is used to create a TeX file for viewing the WEB
      program.  It takes appropriate care of typographic details like page
      layout and the use of indentation, italics, boldface, etc., and it
      supplies extensive cross-index information that it gathers automatically.
      The command line arguments are the same as for tangle except for the
      option:  -x says to omit the index, module name list, and table of
      contents pages.  (A CONTENTS.tex file will still be written when the TeX
      file is processed, however, unless some macros in webmac.tex are
      redefined.)

      The output TeX file name is formed by adding .tex to the root of the WEB
      file name.

      There are several macros that probably should be redefined by the
      programmer at the beginning of the WEB file.  It is a good idea to set
      \title to the name of the program.  And, to cause output of only changed
      modules, one can say \let\maybe=\iffalse (usually as the first change in
      the change file).



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WEB(1)                      UNIX System V(5/27/90)                       WEB(1)


FILES
      /usr/TeX/inputs/TeXmacros/webmac.tex   TeX macros used by weave output.

SEE ALSO
      The WEB System of Structured Documentation and LiterateProgramming, by
      D.E. Knuth.
      WeavingaProgram, by Wayne Sewell
      tex(1), pc(1)
      pxp(1) (for formatting tangle output when debugging)
      TeX: The Program and METAFONT: The Program,volumesBandD Computers and
      Typesetting series, published by Addison-Wesley, are by far the largest
      extant examples of WEB programs.

AUTHORS
      WEB was designed by Donald E. Knuth, based on an earlier system called
      DOC (implemented by Ignacio Zabala).  The tangle and weave programs are
      themselves written in WEB. The system was originally ported to Unix at
      Stanford by Howard Trickey, and at Cornell by Pavel Curtis.




































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