Query Expansion

<span></span><p dir="ltr"><span>Generally used in Information Retrieval, query expansion is a broad topic that includes synonym inclusion, discovering and adding all morphological equivalents, eliminating or including errors in spelling, etc. Specifically, we are interested in the following three capabilities:</span></p><br/><p dir="ltr"><span>Fuzzy Matching - Given a word, returns a list of words of similar spelling. This is useful for spelling correction</span></p><br/><p dir="ltr"><span>Stemmed Matching - Given a word, return a list of words that have the same stem as the provided word. For instance, educator, education, educate all stem to educ. This can be useful for finding things that might be related to a given keyword.</span></p><br/><p dir="ltr"><span>Wildcard matching - Given a term with one or more wildcard entries denoted by *, return a list of terms that match, for instance, tra*n might return train and transportation.</span></p><br/><p dir="ltr"><span>Use a common english reference, like the Princeton WordNet (</span><a href="http://wordnet.princeton.edu/"><span>http://wordnet.princeton.edu/</span></a><span>) as a word source.</span></p><br/><p dir="ltr"><span>For more information:</span></p><p dir="ltr"><span>http://en.wikipedia.org/wiki/Query_expansion</span></p><a href="http://nlp.stanford.edu/IR-book/html/htmledition/query-expansion-1.html"><span>http://nlp.stanford.edu/IR-book/html/htmledition/query-expansion-1.html</span></a>
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