On Jun 13, 2005, at 10:58 AM, Kadlabalu, Hareesh wrote:
Hi,
I have a simple index with one default field that is stored and
indexed. I
want to display the query results along with some relevant text
from the
default field, the way search is implemented at http://
www.lucenebook.com/
<http://www.lucenebook.com/> .
For example, searching for 'wonderful'
(http://www.lucenebook.com/search?query=Wonderful
<http://www.lucenebook.com/search?query=Wonderful> ) generates
results that
have highlighting on relevant words in the result.
One way to implement this would be get documents from search result
and
physically parse the contents of the default field for the
occurrence of the
search word or one of its synonyms (Wonderful: wonder,
wonderfully.. ). Then
display a few words before and after a match for contextual
information.
However, in order to really do it correctly, one needs to get to
the 'best'
part field's text where the density of searched word(s) is highest.
This
could be a very expensive process. Does Lucene give any help is
achieving
this?
The Highlighter (under contrib in the Lucene Subversion repository)
does a bit of finding the best fragments - you can customize this
aspect of it. Check the source code and test cases for more details
on how to customize this sort of thing.
Erik
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