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- <title>Module: Porter2</title>
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- <div id="classHeader">
- <table class="header-table">
- <tr class="top-aligned-row">
- <td><strong>Module</strong></td>
- <td class="class-name-in-header">Porter2</td>
- </tr>
- <tr class="top-aligned-row">
- <td><strong>In:</strong></td>
- <td>
- <a href="../files/lib/porter2stemmer/constants_rb.html">
- lib/porter2stemmer/constants.rb
- </a>
- <br />
- </td>
- </tr>
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- </div>
- <!-- banner header -->
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- <div id="bodyContent">
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- <div id="description">
- <p>
-Constants for the Porter 2 stemmer
-</p>
-
- </div>
-
-
- </div>
-
-
- </div>
-
-
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- <div id="section">
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-
- <div id="constants-list">
- <h3 class="section-bar">Constants</h3>
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- <div class="name-list">
- <table summary="Constants">
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">C</td>
- <td>=</td>
- <td class="context-item-value">"[^aeiouy]"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-A non-vowel
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">V</td>
- <td>=</td>
- <td class="context-item-value">"[aeiouy]"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-A vowel: a e i o u y
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">CW</td>
- <td>=</td>
- <td class="context-item-value">"[^aeiouywxY]"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-A non-vowel other than w, x, or Y
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">Double</td>
- <td>=</td>
- <td class="context-item-value">"(bb|dd|ff|gg|mm|nn|pp|rr|tt)"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Doubles created when adding a suffix: these are undoubled when stemmed
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">Valid_LI</td>
- <td>=</td>
- <td class="context-item-value">"[cdeghkmnrt]"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-A valid letter that can come before ‘li’ (or ‘ly’)
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">SHORT_SYLLABLE</td>
- <td>=</td>
- <td class="context-item-value">"((#{C}#{V}#{CW})|(^#{V}#{C}))"</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-A specification for a short syllable.
-
-<p>
-A short syllable in a word is either:
-</p>
-<ol>
-<li>a vowel followed by a non-vowel other than w, x or Y and preceded by a
-non-vowel, or
-
-</li>
-<li>a vowel at the beginning of the word followed by a non-vowel.
-
-</li>
-</ol>
-<p>
-(The original document is silent on whether sequences of two or more
-non-vowels make a syllable long. But as this specification is only used to
-find sequences of non-vowel - vowel - non-vowel - end-of-word, this
-ambiguity does not have an effect.)
-</p>
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">STEP_2_MAPS</td>
- <td>=</td>
- <td class="context-item-value">{"tional" => "tion",\r "enci" => "ence",\r "anci" => "ance",\r "abli" => "able",\r "entli" => "ent",\r "ization" => "ize",\r "izer" => "ize",\r "ational" => "ate",\r "ation" => "ate",\r "ator" => "ate",\r "alism" => "al",\r "aliti" => "al",\r "alli" => "al",\r "fulness" => "ful",\r "ousli" => "ous",\r "ousness" => "ous",\r "iveness" => "ive",\r "iviti" => "ive",\r "biliti" => "ble",\r "bli" => "ble",\r "fulli" => "ful",\r "lessli" => "less" }</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Suffix transformations used in porter2_step2. (ogi, li endings dealt with
-in procedure)
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">STEP_3_MAPS</td>
- <td>=</td>
- <td class="context-item-value">{"tional" => "tion",\r "ational" => "ate",\r "alize" => "al",\r "icate" => "ic",\r "iciti" => "ic",\r "ical" => "ic",\r "ful" => "",\r "ness" => "" }</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Suffix transformations used in porter2_step3. (ative ending dealt with in
-procedure)
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">STEP_4_MAPS</td>
- <td>=</td>
- <td class="context-item-value">{"al" => "",\r "ance" => "",\r "ence" => "",\r "er" => "",\r "ic" => "",\r "able" => "",\r "ible" => "",\r "ant" => "",\r "ement" => "",\r "ment" => "",\r "ent" => "",\r "ism" => "",\r "ate" => "",\r "iti" => "",\r "ous" => "",\r "ive" => "",\r "ize" => "" }</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Suffix transformations used in porter2_step4. (ion ending dealt with in
-procedure)
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">SPECIAL_CASES</td>
- <td>=</td>
- <td class="context-item-value">{"skis" => "ski",\r "skies" => "sky",\r \r "dying" => "die",\r "lying" => "lie",\r "tying" => "tie",\r "idly" => "idl",\r "gently" => "gentl",\r "ugly" => "ugli",\r "early" => "earli",\r "only" => "onli",\r "singly" =>"singl",\r \r "sky" => "sky",\r "news" => "news",\r "howe" => "howe",\r "atlas" => "atlas",\r "cosmos" => "cosmos",\r "bias" => "bias",\r "andes" => "andes" }</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Special-case stemmings
-
-</td>
- </tr>
- <tr class="top-aligned-row context-row">
- <td class="context-item-name">STEP_1A_SPECIAL_CASES</td>
- <td>=</td>
- <td class="context-item-value">%w[ inning outing canning herring earring proceed exceed succeed ]</td>
- <td width="3em"> </td>
- <td class="context-item-desc">
-Special case words to stop processing after step 1a.
-
-</td>
- </tr>
- </table>
- </div>
- </div>
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projects / porter2stemmer.git / blobdiff