TANGLE(1)TANGLE(1)NAMEtangle - translate WEB to Pascal
SYNOPSIStangle webfile[.web] [ changefile[.ch] ]
DESCRIPTION
This manual page is not meant to be exhaustive. The complete documen‐
tation for this version of TeX can be found in the info file or manual
Web2C: A TeX implementation.
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 con‐
veniently.
The Web language allows you to prepare a single document containing all
the information that is needed both to produce a compilable Pascal pro‐
gram 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 sim‐
ple, 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.
SEE ALSOpc(1), pxp(1) (for formatting tangle output when debugging), tex(1).
Donald E. Knuth, The Web System of Structured Documentation.
Donald E. Knuth, Literate Programming, Computer Journal 27, 97-111,
1984.
Wayne Sewell, Weaving a Program, Van Nostrand Reinhold, 1989, ISBN
0-442-31946-0.
Donald E. Knuth, TeX: The Program (Volume B of Computers and Typeset‐
ting), Addison-Wesley, 1986, ISBN 0-201-13437-3.
Donald E. Knuth, Metafont: The Program (Volume D of Computers and Type‐
setting), Addison-Wesley, 1986, ISBN 0-201-13438-1.
These last two are by far the largest extant examples of Web programs.
There is an active Internet electronic mail discussion list on the sub‐
ject of literate programming; send a subscription request to litprog-
request@shsu.edu to join.
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.
Web2C 7.3.1 12 February 1993 TANGLE(1)
