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htdig(1)		    General Commands Manual		      htdig(1)

NAME
       htdig - retrieve	HTML documents for ht://Dig search engine

SYNOPSIS
       htdig [options]

DESCRIPTION
       Htdig  retrieves	HTML documents using the HTTP protocol and gathers in-
       formation from these documents which can	later be used to search	 these
       documents. This program can be referred to as the search	robot.

OPTIONS
       -      Get the list of URLs to start indexing from standard input. This
	      will override the	default	parameter start_url specified  in  the
	      config file  and the file	supplied to the	-m option.

       -a     Use  alternate  work files. Tells	htdig to append	.work to data-
	      base files, causing a second copy	of the database	to  be	built.
	      This allows the original files to	be used	by htsearch during the
	      indexing run.

       -c configfile
	      Use the specified	configfile instead of the default.

       -h maxhops
	      Restrict the dig to documents that are  at  most	maxhops	 links
	      away from	the starting document. This only works if option -i is
	      also given.

       -i     Initial. Do not use any old databases.  Old  databases  will  be
	      erased before runing the program.

       -m filename
	      Minimal run. Only	index the URLs given in	the file filename, ig-
	      noring all others. URLs in the file should be formatted one  URL
	      per line.	 -s Print statistics about the dig after completion.

       -t     Create  an ASCII version of the document database. This database
	      is easy to parse with other programs so that information can  be
	      extracted	 from  it for purposes other than searching. One could
	      gather some interesting statistics from this database.

	      Fieldname				  Value
		  u	  URL
		  t	  Title
		  a	  State
			  (0 normal, 1 not found, 2 not	indexed, 3 obsolete)
		  m	  Time of last modification reported by	the server
		  s	  Document Size	in bytes
		  H	  Excerpt of the document
		  h	  Meta Description
		  l	  Time of last rerievial
		  L	  Count	of links in the	document or  of	outgoing links
		  b	  Number of links to the document, also	called
			  incoming links or backlinks
		  c	  Hop count of this document
		  g	  Signature of this document
			  (used	to detect duplicates)
		  e	  E-Mail address to use	for a notification from	htnotify
		  n	  Date on which	such notification is sent
		  S	  Subject of the notfication message

		  d	  The text of Incoming links pointing to this document
			  (e.g.	<a href="docURL">description</a>)
		  A	  Anchors in the document (i.e.	<A NAME=...)

       -u username:password
	      Tells htdig to send the supplied username	and password with each
	      HTTP  request. The credentials will be encoded using the 'Basic'
	      authentication method. There HAS to be a colon (:)  between  the
	      username and password.

       -v     Verbose mode. This increases the verbosity of the	program. Using
	      more than	2 is probably only useful for debugging	purposes.  The
	      default  verbose	mode (using only one -v) gives a nice progress
	      report while digging. Please consult the section	below  on  the
	      exact format of the progress report.

       FORMAT OF THE PROGRESS REPORT GIVEN IN VERBOSE MODE
	      A	 line is shown for each	URL, with 3 numbers before the URL and
	      some symbols after the URL. The first number is  the  number  of
	      documents	 parsed	so far,	the second is the DocID	for this docu-
	      ment, and	the third is the hop count of the document (number  of
	      hops  from one of	the start_url documents). Signification	of the
	      sybols printed after the url:

	      "*" is printed for a link	already	visited

	      "+" is printed for a new link just queued

	      "-" is output for	a link rejected	for any	of a  number  of  rea-
	      sons.  To	find out what those reasons are, you need to run htdig
	      with at least 3 -v options, i.e. -vvv.

       If there	are no "*", "+"	or "-" symbols after the URL, it doesn't  mean
       the  document  was  not	parsed or was empty, but only that no links to
       other documents were found within it. With more verbose	output,	 these
       symbols will get	interspersed in	several	lines of debugging output.

       FILES

       /usr/local/etc/htdig/htdig.conf
	      The  default  configuration  file.  /usr/local/share/htdig/data-
	      base/db.docdb Stores  data  about	 each  document	 (title,  url,
	      etc.).	/usr/local/share/htdig/database/db.words.db,  /usr/lo-
	      cal/share/htdig/database/db.words.db_weakcmpr Record which docu-
	      ments   each   word   occurs  in.	  /usr/local/share/htdig/data-
	      base/db.excerpts Stores start of each document to	 show  context
	      of matches.

SEE ALSO
       Please	refer	to   the   HTML	  pages	 (in  the  htdig-doc  package)
       /usr/share/doc/htdig-doc/html/index.html	and the	manual pages htdigcon-
       fig(8) ,	htmerge(1) , htnotify(1) , htsearch(1) and rundig(1) for a de-
       tailed description of ht://Dig and its commands.

AUTHOR
       This manual page	was written by Christian Schwarz, modified by Stijn de
       Bekker. It is updated and maintained by Robert Ribnitz and based	on the
       HTML documentation of ht://Dig.

				 21 July 1997			      htdig(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR

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