CustomQueryParser
I found the following solution in the forum to use BoostingTermQuery in solr: "I ended up subclassing QueryParser and overriding newTermQuery() to create a BoostingTermQuery instead of a plain ol' TermQuery. Seems to work. " http://www.nabble.com/RE:-using-BoostingTermQuery-p19651792.html I have some questions on this: 1) Anyone tried this? Is it working 2) Where to specify the query parser subclass name? SolrConfig.xml? What is the xml tag name for this? 3) Should we use Qparser? I think we can directly subclass the QueryParser and do that. Am I right? 4) Kindly post the code sample to override the newTermQuery() to create a BoostingTermQuery Thanks in advance Ayyanar -- View this message in context: http://www.nabble.com/CustomQueryParser-tp21012136p21012136.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: using BoostingTermQuery
> I'm no QueryParser expert, but I would probably start w/ the default > query parser in Solr (LuceneQParser), and then progress a bit to the > DisMax one. I'd ask specific questions based on what you see there. > If you get far enough along, you may consider asking for help on the > java-user list as well. >Thanks - I think I've got it working now. I ended up subclassing QueryParser and overriding >newTermQuery() to create a BoostingTermQuery instead of a plain ol' TermQuery. Seems to work. Kindly let me know where and how to configure the overridden query parser in solr -Ayyanar -- View this message in context: http://www.nabble.com/using-BoostingTermQuery-tp19637123p21011626.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: scoring individual values in a multivalued field
Hi Sebastin, did you find solution for your problem. Kindly post the code examples. This will help me lot. -- View this message in context: http://www.nabble.com/scoring-individual-values-in-a-multivalued-field-tp19212800p21008475.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: scoring individual values in a multivalued field
Hi Hossman, you suggested two solutions. Can you explain little bit more on the second option? Iam not able to understand. Kindly explain with an example At the moment, the simplest mechanisms for achieving something like what you are describing that i know of are: 1) repetitive values. Add a value twice to make it counnt (roughly) twice as much. (eliminating lengthNorm and customing your Similarity is neccessary to make it worth exactly twice as much) 2) differnet fields. Partition the spectrum of "importance" for your values into N buckets, make a field for each bucket, put the value in the bucket that makes the most sense, and at query time query ofr each bucket with a differnet query time boost. -- View this message in context: http://www.nabble.com/scoring-individual-values-in-a-multivalued-field-tp19212800p21008401.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: Nwebie Question on boosting
Thanks Rob. Can you plz provide some sample documents (lucene) for title bassed boosting? -- View this message in context: http://www.nabble.com/Nwebie-Question-on-boosting-tp20950286p20952532.html Sent from the Solr - User mailing list archive at Nabble.com.
Nwebie Question on boosting
I read many articles on boosting still iam not so clear on boosting. Can anyone explain the following questions with examples? 1) Can you given an example for field level boosting and document level boosting and the difference between two? 2) If we set the boost at field level (index time), should the query contains the that particular field? For example, if we set the boost for title field, should we create the termquery for title field? Also, based on your experience, can you explain why you need the boosting. Thanks, Ayyanar. A -- View this message in context: http://www.nabble.com/Nwebie-Question-on-boosting-tp20950286p20950286.html Sent from the Solr - User mailing list archive at Nabble.com.
Newbie Question boosting
I read many articles on boosting still iam not so clear on boosting. Can anyone explain the following questions with examples? 1) Can you given an example for field level boosting and document level boosting and the difference between two? 2) If we set the boost at field level (index time), should the query contains the that particular field? For example, if we set the boost for title field, should we create the termquery for title field? Also, based on your experience, can you explain why you need the boosting. Thanks, Ayyanar. A -- View this message in context: http://www.nabble.com/Newbie-Question-boosting-tp20950268p20950268.html Sent from the Solr - User mailing list archive at Nabble.com.
Value based boosting - Design Help
We have a requirement for a keyword search in one of our projects and we are using Solr/Lucene for the same. We have the data, link_id, title, url and a collection of keywords associated to a link_id. Right now we have indexed link_id, title, url and keywords (multivalued field) in a single index. Also, in our requirement each keyword value has a weight associated to it and this weight is calculated based on certain factors like (if the keyword exist in title then it takes a specific weight etc…). This weight should drive the relevancy on the search result. For example, when a user enters a keyword called “Biology” and clicks search, we search the keywords field in the index. That document that contains the searched keyword with higher weight should come first. Eg: Document 1: LinkID = 100 Title = Biology Keywords = Biology, BioNews, Bio, Bio chemistry Document 2: LinkID = 102 Title = Nutrition Keywords = Biology, Nutrition, Dietics In the above example document 1 should come first because we will associate more weight to the keyword biology for link id 100 in document 1 We understand that this weight can be applied as a boost to a field. The problem is that in Solr/Lucene we cannot associate a different boost to different values of a same field. It would be vey helpful for us if you can provide your thoughts/inputs on how to achieve this requirement in Lucene: Do we have a way to associate a different boost to different values of a same field? Can we maintain the list of keywords associated to each link_id in a separate index, so that we can associate weight to each keyword value? If so, how do we relate the main index and the keyword index? -- View this message in context: http://www.nabble.com/Value-based--boosting---Design-Help-tp20934304p20934304.html Sent from the Solr - User mailing list archive at Nabble.com.
