NovelAnalyzer - wraps your choice of Lucene Analyzer and filters out all 
"boilerplate" text
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                 Key: LUCENE-725
                 URL: http://issues.apache.org/jira/browse/LUCENE-725
             Project: Lucene - Java
          Issue Type: New Feature
          Components: Analysis
            Reporter: Mark Harwood
            Priority: Minor
         Attachments: NovelAnalyzer.java

This is a class I have found to be useful for analyzing small (in the hundreds) 
collections of documents and  removing any duplicate content such as standard 
disclaimers or repeated text in an exchange of  emails.
This has applications in sampling query results to identify key phrases, 
improving speed-reading of results with similar content (eg email threads/forum 
messages) or just removing duplicated noise from a search index.

To be more generally useful it needs to scale to millions of documents - in 
which case an alternative implementation is required. See the notes in the 
Javadocs for this class for more discussion on this

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