No, there is no whitespace after the comma in Input1 Input1: C1C2,C3C4,C5C6,C7,C8C9C10 Input2: C1C2 C3C4 C5C6 C7 C8C9C10
Input1 is basically one big long word with commas and Chinese characters one after the other. Input2 is where I manually separated the string into the component terms by replacing the comma with whitespace. My confusion stems from the fact that I thought it should not matter since the analyzer should be discarding the punctuation anyway? So the tokenization process should be the same for both Input1 and Input2? If that is not the case, what do I need to change?
Thanks, Wei Ho -------- Original Message -------- Subject: Re: Lucene QueryParser and Analyzer From: Sudarsan, Sithu D. <sithu.sudar...@fda.hhs.gov> To: java-user@lucene.apache.org Date: 4/29/2010 3:54 PM
Hi, Is there a whitespace after the comma? Sincerely, Sithu D Sudarsan -----Original Message----- From: Wei Ho [mailto:we...@princeton.edu] Sent: Thursday, April 29, 2010 3:51 PM To: java-user@lucene.apache.org Subject: Lucene QueryParser and Analyzer Hello, I'm using Lucene to index and search through a collection of Chinese documents. However, I'm noticing an odd behavior in query parsing/searching. Given the two queries below: (Ci refers to Chinese character i) Input1: C1C2,C3C4,C5C6,C7,C8C9C10 Input2: C1C2 C3C4 C5C6 C7 C8C9C10 Input1 returns absolutely nothing, while Input2 (replacing the commas with spaces) works as expected. I'm a bit confused why this would be happening - it seems that QueryParser uses the Analyzer passed to it to tokenize the input query string, so if the Analyzer ignores the punctuations, it seems that Input1 and Input2 should return identical results. Is there some pre-Analyzer filtering or whatever that QueryParser does? I've tried this with the StandardAnalyzer, SmartChineseAnalyzer, and an analyzer that I implemented which explicitly skips over punctuations and whitespaces in tokenizing the query string, but to no avail. -------sample code------------- Analyzer analyzer = new LingPipeAnalyzer(); Searcher searcher = new IndexSearcher(directory); QueryParser qParser = new MultiFieldQueryParser(Version.LUCENE_30, SEARCH_FIELDS, analyzer); Query query = qParser.parse(queryLine[1]); ScoreDoc[] results = searcher.search(query, TOP_N).scoreDocs; ----------------------------------- I'm probably just doing something dumb, but any help would be greatly appreciated! Thanks, Wei Ho --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
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