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https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470074
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Mark Miller commented on LUCENE-794:
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There are two highlighting modes: highlight entire spans or highlight first and 
last word of each span. For the highlight first and last word of span it would 
probably be better to change QuerySpansExtractor.getSpansFromPhraseQuery so 
that it creates a series of near spans instead of a single near span with 
multiple clauses.

> Beginnings of a span based highlighter
> --------------------------------------
>
>                 Key: LUCENE-794
>                 URL: https://issues.apache.org/jira/browse/LUCENE-794
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Other
>         Environment: There are prob a few Java 1.5 requirements (generics) 
> that could easily be removed.
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments: DefaultEncoder.java, Encoder.java, Formatter.java, 
> Highlighter.java, HighlighterTest.java, QuerySpansExtractor.java, 
> SimpleFormatter.java
>
>
> This is some test code to start the work of adding a span based highlighting 
> approach to the existing highlighter in contrib. See 
> http://issues.apache.org/jira/browse/LUCENE-403 for some background.
> There is a dependency on MemoryIndex.

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