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Posted to java-user@lucene.apache.org by "shrinath.m" <sh...@webyog.com> on 2011/04/01 14:32:35 UTC
Difference between regular Highlighter and Fast Vector Highlighter
?
I was wondering whats the difference between the Lucene's 2 implementation of
highlighters...
I saw the javadoc of FVH, but it only says "another implementation of Lucene
Highlighter" ...
Can someone throw some more light on this ?
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Re: Difference between regular Highlighter and Fast Vector
Highlighter ?
Posted by "shrinath.m" <sh...@webyog.com>.
Got it :)
Thanks for the link.
[closed]
On Sat, Apr 2, 2011 at 6:14 AM, Koji Sekiguchi [via Lucene] <
ml-node+2765616-1923995541-376162@n3.nabble.com> wrote:
> (11/04/01 21:32), shrinath.m wrote:
> > I was wondering whats the difference between the Lucene's 2
> implementation of
> > highlighters...
> > I saw the javadoc of FVH, but it only says "another implementation of
> Lucene
> > Highlighter" ...
>
> Description section in the javadoc shows the features of FVH:
>
>
> https://builds.apache.org/hudson/job/Lucene-trunk/javadoc/all/org/apache/lucene/search/vectorhighlight/package-summary.html#package_description
>
> * fast for large docs
> * support N-gram fields
> * support phrase-unit highlighting with slops
> * need Java 1.5
> * highlight fields need to be TermVector.WITH_POSITIONS_OFFSETS
> * take into account query boost to score fragments
> * support colored highlight tags
> * pluggable FragListBuilder
> * pluggable FragmentsBuilder
>
> Koji
> --
> http://www.rondhuit.com/en/
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Shrinath.M
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Re: Difference between regular Highlighter and Fast Vector Highlighter
?
Posted by Koji Sekiguchi <ko...@r.email.ne.jp>.
(11/04/01 21:32), shrinath.m wrote:
> I was wondering whats the difference between the Lucene's 2 implementation of
> highlighters...
> I saw the javadoc of FVH, but it only says "another implementation of Lucene
> Highlighter" ...
Description section in the javadoc shows the features of FVH:
https://builds.apache.org/hudson/job/Lucene-trunk/javadoc/all/org/apache/lucene/search/vectorhighlight/package-summary.html#package_description
* fast for large docs
* support N-gram fields
* support phrase-unit highlighting with slops
* need Java 1.5
* highlight fields need to be TermVector.WITH_POSITIONS_OFFSETS
* take into account query boost to score fragments
* support colored highlight tags
* pluggable FragListBuilder
* pluggable FragmentsBuilder
Koji
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Re: Difference between regular Highlighter and Fast Vector Highlighter ?
Posted by Mark Miller <ma...@gmail.com>.
The general and short answer is:
Highlighter: highlights more query types, has a fairly rich API, doesn't scale well to very large documents (though https://issues.apache.org/jira/browse/LUCENE-2939 is going to help a lot here) - does not require that you store term vectors, but is faster if you do.
FVH: works with fewer query types and requires that you store term vectors - but scales better than the std Highlighter to very large documents
- Mark Miller
lucidimagination.com
Lucene/Solr User Conference
May 25-26, San Francisco
www.lucenerevolution.org
On Apr 1, 2011, at 8:32 AM, shrinath.m wrote:
> I was wondering whats the difference between the Lucene's 2 implementation of
> highlighters...
> I saw the javadoc of FVH, but it only says "another implementation of Lucene
> Highlighter" ...
>
> Can someone throw some more light on this ?
>
> --
> View this message in context: http://lucene.472066.n3.nabble.com/Difference-between-regular-Highlighter-and-Fast-Vector-Highlighter-tp2763162p2763162.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
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