REDET(1)							   User Commands							  REDET(1)

NAME

       redet - regular expression development and execution tool

SYNOPSIS

       redet <options> [<input file>]

DESCRIPTION

       redet  allows  the user to construct regular expressions and test them against input data by executing any of a variety of search programs,
       editors, and programming languages that make use of regular expressions. When a suitable regular expression has been constructed it may	be
       saved to a file.

       Redet  currently  supports over fifty different programs and regular expression libraries. These include multiple versions of grep, several
       editors (Ed, Emacs, Sed, Vim), all the popular scripting languages (Awk, Perl, Python, Ruby, Tcl) and some less popular	ones  (Lua,  Pike,
       Rebol), most shells (Bash, Ksh, Tcsh, Zsh) and various other languages, including Guile, Icon and Java.

       For  each  program, a palette showing the available regular expression syntax is provided. Selections from the palette may be copied to the
       regular expression window with a mouse click. Users may add their own definitions to the palette via their initialization file.	Redet also
       keeps a list of the regular expressions executed, from which entries may be copied back into the regular expression under construction. The
       history list is saved to a file and restored on startup, so it persists across sessions.

       Redet provides both regular expression matching and substitution so long as the underlying program does.

       Although Redet is primarily an interface for other programs, it adds some features of its own.  It is possible to  define  named  character
       classes within Redet  and to intersect them. This allows provides a means of searching on feature matrices.

       So  long  as  the  underlying program supports Unicode, redet allows UTF-8 Unicode in both test data and regular expressions. Several tools
       provide additional support for Unicode use. These include popup lists of Unicode ranges and general  character  properties,  a  widget  for
       entering characters by their numerical code, and widgets for entering International Phonetic Alphabet characters, widgets for entering let-
       ters with a variety of accents and other diacritics. Although internal operations are entirely in Unicode, test data, comparison data,  and
       results	may be read and written in any encoding supported by Tcl/Tk.  Redet is fully internationalized. If a suitable message catalogue is
       provided, the interface may be made available in any language and writing system supported by Unicode for which	the  necessary	fonts  are
       available.

       For usage information, execute redet with the command line flag -h.

       Full  information  about redet is available from the reference manual, which consists of a set of web pages. The master copy is located at:
       http://www.cis.upenn.edu/~wjposer/RedetManual/Manual.html.  The entry Illustrated Web Manual on the Help menu will take you to  the  master
       manual page.  The manual pages are packaged with every copy of Redet.

OPTIONS

       -c <file name>
	      read character class definitions from the named file

       -d     set the debug flag.  This causes additional information to be printed during program execution.  It is mostly useful for developers.

       -F <filename>
	      read a feature list from <filename>

       -f     act as a filter. This means that input is read from the standard input and output written to the standard output.

       -H     do not read the history file

       -h     print this help information

       -I <file>
	      read <file> as the initialization file

       -i     do not read the initialization file

       -n     do not execute feature tests on startup

       -P     list the programs supported and indicate which are available

       -p <program>
	      use the named program

       -s     start up in substitution mode

       -t     show the results of feature tests

       -v     print the program name and version, then exit

SEE ALSO

       awk (1), ed (1),grep (1), perl (1), sed (1)

AUTHOR

       Bill Poser (billposer@alum.mit.edu)

LICENSE

       GNU General Public License (http://www.gnu.org/licenses/gpl.txt), version 2.

redet								     May 2007								  REDET(1)