ht://Dig Copyright © 1995-2004 The ht://Dig Group
Please see the file COPYING for
htdig [options] [start_url_file]
Htdig retrieves HTML documents using the HTTP protocol and
gathers information from these documents which can later be
used to search these documents. This program can be
referred to as the search robot.
Use alternate work files. Tells htdig to append
.work to database 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. When
used without the "-i" flag for an update dig, htdig will
use any existing .work files for the databases to update.
Use the specified configfile file instead of the
Restrict the dig to documents that are at most
maxhops links away from the starting document.
Initial. Do not use any old databases. This is
accomplished by first erasing the databases.
Minimal. Index only the URLs listed in
url_file and no others.
A file name of "-" reads from STDIN.
See also the start_url_file argument.
Print statistics about the dig after completion.
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.
Each line in the file starts with the document id
followed by a list of
The fields always appear in the order listed below:
|a||State (0 = normal, 1 = not found, 2
= not indexed, 3 = obsolete)|
|m||Last modification time as reported
by the server|
|s||Size in bytes|
|l||Time of last retrieval|
|L||Count of the links in the document
|b||Count of the links to the document
(incoming links or backlinks)|
|c||HopCount of this document|
|g||Signature of the document used for
|e||E-mail address to use for a
notification message from htnotify|
|n||Date to send out a notification
|S||Subject for a notification e-mail
|d||The text of links pointing to this
document. (e.g. <a
|A||Anchors in the document (i.e. <A
Tells htdig to send the supplied username and password
with each HTTP request. The credentials will be encoded
using the 'Basic' authentication scheme. There
HAS to be a colon (:) between the username and
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. This progress report can be a bit
cryptic, so here is a brief explanation. 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 document,
and the third is the hop count of the document
(number of hops from one of the start_url
documents). After the URL, it shows a "*" for
a link in the document that it already visited,
a "+" for a new link it just queued, and a "-"
for a link it rejected for any of a number of
reasons. 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.
A file containing a list of URLs to start indexing
from, or "-" for STDIN. This will augment the default
and override the file supplied to
The default configuration file.
Stores data about each document (title, url, etc.).
Record which documents each word occurs in.
Stores start of each document to show context of
Configuration file format, and
A Standard for Robot Exclusion.
Last modified: $Date: 2004/06/14 08:49:46 $