Yes, the Payload stuff should work for this, but you will have to set
it up during indexing. The simpler approach is probably a separate
field for synonyms, but this means analyzing the same content twice
(or trying out the TeeTokenFilter, but this is advanced usage at this
point, since it is unreleased.)
There is no support for payloads in the query parser, so you would
have to construct the queries on your own or at least add in queries
based on the clauses that the QueryParser outputs.
On Dec 28, 2007, at 10:54 AM, Frank Schima wrote:
Hi Grant,
Grant Ingersoll-6 wrote:
You can use the payload functionality (have a look at
BoostingTermQuery and Michael B. excellent ApacheCon talk at
http://people.apache.org/~buschmi/apachecon/). Other option is to
put
the synonyms into a separate field and boost that less than the main
field.
On Dec 27, 2007, at 4:19 PM, Frank Schima wrote:
So I have my fancy new stemmed synonym based Lucene index. Let's say
I have
the following synonym defined:
radiation -> radiotherapy (and the reverse)
The search results rank all results exactly the same. Is there a way
to
Boost the actual search term a little higher than the synonym(s)?
To be clear, if someone searches for "radiation" I want content
exactly with
"radiation" to rank higher than content with "radiotherapy". But if
someone
searches for "radiotherapy", I want content with that to rank higher
than
content with "radiation". Will Payloads do this for me?
I would try it but I'm having trouble figuring out how to do the
search. For
the search, I'm currently using a MultiFieldQueryParser, so like this:
SnowballAnalyzer sba = new SnowballAnalyzer("English",
StopAnalyzer.ENGLISH_STOP_WORDS);
QueryParser qp = new MultiFieldQueryParser( new String[] {"field1",
"field2", "field3"}, sba );
try {
Query query = qp.parse(strSearchTerms);
} catch ( Throwable th) {
...
}
However, the payload example in the presentation requires a
BoostingTermQuery, like this:
Query query = new BoostingTermQuery( new Term(“field”,
“searchterm”));
Is there a way to make the two work together?
Thanks!
Frank
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Grant Ingersoll
http://lucene.grantingersoll.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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