[ http://issues.apache.org/jira/browse/NUTCH-134?page=comments#action_12361350 ]
byron miller commented on NUTCH-134: ------------------------------------ Where is the lucene summarizer from the contrib? i'm not seeing anything obvious (unless it's under a different name) > Summarizer doesn't select the best snippets > ------------------------------------------- > > Key: NUTCH-134 > URL: http://issues.apache.org/jira/browse/NUTCH-134 > Project: Nutch > Type: Bug > Components: searcher > Versions: 0.7.1, 0.7, 0.7.2-dev, 0.8-dev > Reporter: Andrzej Bialecki > > Summarizer.java tries to select the best fragments from the input text, where > the frequency of query terms is the highest. However, the logic in line 223 > is flawed in that the excerptSet.add() operation will add new excerpts only > if they are not already present - the test is performed using the Comparator > that compares only the numUniqueTokens. This means that if there are two or > more excerpts, which score equally high, only the first of them will be > retained, and the rest of equally-scoring excerpts will be discarded, in > favor of other excerpts (possibly lower scoring). > To fix this the Set should be replaced with a List + a sort operation. To > keep the relative position of excerpts in the original order the Excerpt > class should be extended with an "int order" field, and the collected > excerpts should be sorted in that order prior to adding them to the summary. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ Nutch-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nutch-developers
