Harini,
I'm not sure I understand what you're asking. IDF doesn't factor
into highlighting.
IDF calculations are useful in scoring documents during a search,
such that the most relevant documents are returned, but again this is
unrelated to highlighting.
Could you elaborate on what you're after?
Erik
On Dec 30, 2005, at 12:02 PM, Harini Raghavan wrote:
Hi,
I have a requirement to highlight search keywords in the results and
display the matching fragment of the text with the results. I am using
the Hits highlighting mentioned in Lucene in Action.
Here is the search query(BooleanQuery) I am passing to the
IndexSearcher
and QueryScorer:
+DocumentType:news
+(CompanyId:10 CompanyId:20 CompanyId:30 CompanyId:40)
+FilingDate:[20041201 TO 20051201]
+(Content:"cost saving" Content:"cost savings" Content:outsource
Content:outsources Content:downsize Content:downsizes
Content:restructuring Content:restructure)
I do not quite understand how the query scoring actually works &
how Inverse Document Frequency(IDF) calculations are useful? Can
someone shed some light on this using the given query as an example?
Thanks,
Harini
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