[jira] Commented: (LUCENE-626) Extended spell checker with phrase support and adaptive user session analysis.

["Nicolas Lalevée (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12477685 ] 

Nicolas Lalevée commented on LUCENE-626:
----------------------------------------

This feature looks interesting, but why should it depend on LUCENE-550 ?

> Extended spell checker with phrase support and adaptive user session analysis.
> ------------------------------------------------------------------------------
>
>                 Key: LUCENE-626
>                 URL: https://issues.apache.org/jira/browse/LUCENE-626
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Karl Wettin
>         Assigned To: Karl Wettin
>            Priority: Minor
>         Attachments: didyoumean.patch.bz2, spellchecker.diff
>
>
> Extensive java docs available in patch, but I try to keep it compiled here: http://ginandtonique.org/~kalle/javadocs/didyoumean/org/apache/lucene/search/didyoumean/package-summary.html#package_description
> The patch spellcheck.diff should not depend on anything but Lucene trunk. It has basic support for phrase suggestions  and query goal detection, but is pretty buggy and lacks features available in didyoumean.diff.bz2. The latter depends on LUCENE-550.
> Example:
> {code:java}
> public void testImportData() throws Exception {
>     // load 200 000 user queries with session data and time stamp. no goals specified.
>     System.out.println("Processing http://ginandtonique.org/~kalle/data/pirate.data.gz");
>     importFile(new InputStreamReader(new GZIPInputStream(new URL("http://ginandtonique.org/~kalle/data/pirate.data.gz").openStream())));
>     System.out.println("Processing http://ginandtonique.org/~kalle/data/hero.data.gz");
>     importFile(new InputStreamReader(new GZIPInputStream(new URL("http://ginandtonique.org/~kalle/data/hero.data.gz").openStream())));
>     System.out.println("Done.");
>     // run some tests without the second level suggestions,
>     // i.e. user behavioral data only. no ngrams or so.
>     
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates ofthe caribbean"));
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates of the carribbean"));
>     assertEquals("pirates caribbean", facade.didYouMean("pirates carricean"));
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates of the carriben"));
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates of the carabien"));
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates of the carabbean"));
>     assertEquals("pirates of the caribbean", facade.didYouMean("pirates og carribean"));
>     assertEquals("pirates of the caribbean soundtrack", facade.didYouMean("pirates of the caribbean music"));
>     assertEquals("pirates of the caribbean score", facade.didYouMean("pirates of the caribbean soundtrack"));
>     assertEquals("pirate of caribbean", facade.didYouMean("pirate of carabian"));
>     assertEquals("pirates of caribbean", facade.didYouMean("pirate of caribbean"));
>     assertEquals("pirates of caribbean", facade.didYouMean("pirates of caribbean"));
>     // depening on how many hits and goals are noted with these two queries
>     // perhaps the delta should be added to a synonym dictionary? 
>     assertEquals("homm iv", facade.didYouMean("homm 4"));
>     // not yet known.. and we have no second level yet.
>     assertNull(facade.didYouMean("the pilates"));
>     // use the dictionary built from user queries to build the token phrase and ngram suggester.      
>     facade.getDictionary().getPrioritesBySecondLevelSuggester().put(Factory.ngramTokenPhraseSuggesterFactory(facade.getDictionary()), 1d);
>     // now it's learned
>     assertEquals("the pirates", facade.didYouMean("the pilates"));
>     // typos
>     assertEquals("heroes of might and magic", facade.didYouMean("heroes of fight and magic"));
>     assertEquals("heroes of might and magic", facade.didYouMean("heroes of right and magic"));
>     assertEquals("heroes of might and magic", facade.didYouMean("heroes of magic and light"));
>     // composite dictionary key not learned yet..
>     assertEquals(null, facade.didYouMean("heroesof lightand magik"));
>     // learn
>     assertEquals("heroes of might and magic", facade.didYouMean("heroes of light and magik"));
>     // test
>     assertEquals("heroes of might and magic", facade.didYouMean("heroesof lightand magik"));
>     // wrong term order
>     assertEquals("heroes of might and magic", facade.didYouMean("heroes of magic and might"));
>   }
> {code}

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