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240 lines
5.4 KiB
240 lines
5.4 KiB
3 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
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<html>
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<head>
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<title>
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ht://Dig: htfuzzy
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</title>
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</head>
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<body bgcolor="#eef7ff">
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<h1>
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htfuzzy
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</h1>
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<p>
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ht://Dig Copyright © 1995-2004 <a href="THANKS.html">The ht://Dig Group</a><br>
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Please see the file <a href="COPYING">COPYING</a> for
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license information.
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</p>
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<hr size="4" noshade>
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<dl>
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<dd>
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<h2>
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Synopsis
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</h2>
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</dd>
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<dd>
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htfuzzy [-c <em>configfile</em>][-v] <em>algorithm</em> ...
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</dd>
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</dl>
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<dl>
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<dd>
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<h2>
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Description
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</h2>
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</dd>
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<dd>
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Htfuzzy creates indexes for different "fuzzy" search
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algorithms. These indexes can then be used by the
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<a href="htsearch.html" target="_top">htsearch</a> program.
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</dd>
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</dl>
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<dl>
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<dd>
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<h2>
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Options
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</h2>
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</dd>
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<dd>
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<dl compact>
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<dt>
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-c <em>configfile</em>
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</dt>
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<dd>
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Use the specified configuration file instead of the
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default.
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</dd>
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<dt>
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-v
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</dt>
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<dd>
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Verbose mode. Used once will provide progress feedback,
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used more than once will overflow even the biggest
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buffers. :-)
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</dd>
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</dl>
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</dd>
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</dl>
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<dl>
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<dd>
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<h2>
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Algorithms
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</h2>
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</dd>
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<dd>
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Indexes for the following search algorithms can currently
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be created:
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<dl>
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<dt>
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<strong>soundex</strong>
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</dt>
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<dd>
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Creates a slightly modified <a href="http://www.sog.org.uk/cig/vol6/605tdrake.pdf">soundex</a> key database.
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A soundex key encodes letters as digits, with similar
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sounding letters (c, k, q) given the same digit. Vowels
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are not coded.
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Differences with the standard soundex algorithm are:
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<ul>
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<li>
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Keys are 6 digits.
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</li>
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<li>
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The first letter is also encoded.
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</li>
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</ul>
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</dd>
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<dt>
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<strong>metaphone</strong>
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</dt>
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<dd>
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Creates a metaphone key database. This algorithm is
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more specific to English, but will get fewer "weird"
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matches than the soundex algorithm.
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</dd>
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<dt>
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<strong>accents</strong>
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</dt>
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<dd>
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Creates an accents key database. This algorithm will
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map all accented letters to their unaccented
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counterparts, so that a search for the unaccented
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word will yield all variations of this word with
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accents.
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</dd>
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<dt>
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<strong>endings</strong>
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</dt>
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<dd>
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Creates two databases which can be used to match common
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word endings. The creation of these databases requires
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a list of affix rules and a dictionary which uses those
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affix rules. The format of the affix rules and
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dictionary files are the ones used by the
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<a href="http://fmg-www.cs.ucla.edu/fmg-members/geoff/ispell.html">
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ispell</a> program. Included with the distribution are
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the affix rules for English and a fairly small English
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dictionary. Other languages can be supported by getting
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the appropriate affix rules and dictionaries. These are
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available for many languages; check the ispell
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distribution for more details.
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</dd>
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<dt>
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<strong>synonyms</strong>
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</dt>
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<dd>
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Creates a database of synonyms for words. It reads a
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text database of synonyms and creates a database that
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htsearch can then use. Each line of the text database
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consists of words where the first word will have the
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other words on that line as synonyms.
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</dd>
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</dl>
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</dd>
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</dl>
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<dl>
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<dd>
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<h2>
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Files
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</h2>
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</dd>
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<dd>
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<dl>
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<dt>
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<a href="attrs.html#config_dir">CONFIG_DIR</a>/htdig.conf
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</dt>
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<dd>
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The default configuration file.
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#database_dir">DATABASE_DIR</a>/db.accents.db
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</dt>
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<dd>
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(Output) Maps between characters with and without
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accents for accents fuzzy rule
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#database_dir">DATABASE_DIR</a>/db.metaphone.db
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</dt>
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<dd>
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(Output) Database of similar-sounding words for
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metaphone fuzzy rule
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#database_dir">DATABASE_DIR</a>/db.soundex.db
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</dt>
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<dd>
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(Output) Database of similar-sounding words for soundex
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fuzzy rule
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#common_dir">COMMON_DIR</a>/english.0, <a href="attrs.html#common_dir">COMMON_DIR</a>/english.aff
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</dt>
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<dd>
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(Input) List of words and affix rules used to generate
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endings
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#common_dir">COMMON_DIR</a>/root2word.db, <a href="attrs.html#common_dir">COMMON_DIR</a>/word2rood.db
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</dt>
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<dd>
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(Output) Database used for endings fuzzy rule
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#common_dir">COMMON_DIR</a>/synonyms
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</dt>
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<dd>
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(Input) List of groups of words considered synonymous
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</dd>
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</dl>
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<dl>
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<dt>
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<a href="attrs.html#common_dir">COMMON_DIR</a>/synonyms.db
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</dt>
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<dd>
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(Output) Database used for synonyms fuzzy rule
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</dd>
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</dl>
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</dd>
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</dl>
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<dl>
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<dd>
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<h2>
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See Also
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</h2>
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</dd>
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<dd>
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<a href="htdig.html">htdig</a>,
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<a href="htmerge.html">htmerge</a>,
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<a href="htsearch.html" target="_top">htsearch</a>,
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<a href="attrs.html">Configuration file format</a>, and
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<a href="http://fmg-www.cs.ucla.edu/fmg-members/geoff/ispell.html">
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ispell</a>.
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</dd>
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</dl>
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<hr size="4" noshade>
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Last modified: $Date: 2004/06/12 13:39:13 $
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</body>
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</html>
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