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Syns2Index (Lucene 2.1.0 API)
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org.apache.lucene.wordnet</FONT>
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Class Syns2Index</H2>
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<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.apache.lucene.wordnet.Syns2Index</B>
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<DT>public class <B>Syns2Index</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL>
<P>
Convert the prolog file wn_s.pl from the <a href="http://www.cogsci.princeton.edu/2.0/WNprolog-2.0.tar.gz">WordNet prolog download</a> into a Lucene index suitable for looking up synonyms and performing query expansion (<A HREF="../../../../org/apache/lucene/wordnet/SynExpand.html#expand(java.lang.String, org.apache.lucene.search.Searcher, org.apache.lucene.analysis.Analyzer, java.lang.String, float)"><CODE>SynExpand.expand(...)</CODE></A>). This has been tested with WordNet 2.0. The index has fields named "word" (<A HREF="../../../../org/apache/lucene/wordnet/Syns2Index.html#F_WORD"><CODE>F_WORD</CODE></A>) and "syn" (<A HREF="../../../../org/apache/lucene/wordnet/Syns2Index.html#F_SYN"><CODE>F_SYN</CODE></A>). <p> The source word (such as 'big') can be looked up in the "word" field, and if present there will be fields named "syn" for every synonym. What's tricky here is that there could be <b>multiple</b> fields with the same name, in the general case for words that have multiple synonyms. That's not a problem with Lucene, you just use <A HREF="../../../../org/apache/lucene/document/Document.html#getValues(java.lang.String)"><CODE>Document.getValues(java.lang.String)</CODE></A> </p> <p> While the WordNet file distinguishes groups of synonyms with related meanings we don't do that here. </p> This can take 4 minutes to execute and build an index on a "fast" system and the index takes up almost 3 MB.
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<DT><B>Author:</B></DT> <DD>Dave Spencer, dave@searchmorph.com</DD><DT><B>See Also:</B><DD><a href="http://www.cogsci.princeton.edu/~wn/">WordNet home page</a>, <a href="http://www.cogsci.princeton.edu/~wn/man/prologdb.5WN.html">prologdb man page</a>, <a href="http://www.hostmon.com/rfc/advanced.jsp">sample site that uses it</a></DL>
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<CODE>static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/wordnet/Syns2Index.html#F_SYN">F_SYN</A></B></CODE>
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<CODE>static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/wordnet/Syns2Index.html#F_WORD">F_WORD</A></B></CODE>
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<TD><CODE><B><A HREF="../../../../org/apache/lucene/wordnet/Syns2Index.html#Syns2Index()">Syns2Index</A></B>()</CODE>
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