[STANBOL-246] Exact name match should get boosted in the entity hub SolrYard indices

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.0-incubating
• Component/s: Entityhub
• Assignee: Rupert Westenthaler
• Reporter: Olivier Grisel
• Created: 01/Jul/11 10:27
• Updated: 09/May/12 13:47
• Resolved: 06/Mar/12 16:57

Description

For instance, using the default embedded solryard index:

 curl -X POST -d "name=United States&limit=10&offset=0" http://localhost:8080/entityhub/site/dbpedia/find

The first results are "United States Navy" and "United States Air Force" and finally "United States" comes in the third position. See the attached JSON output.

Exact name match (or close to exact matches) should get a score boost. This can probably be implemented with FuzzyQuery and minSimilarity of 0.8f for instance.

https://lucene.apache.org/java/3_3_0/api/all/org/apache/lucene/search/FuzzyQuery.html

Maybe in this case the popularity boost are bad because of the naive incoming links. Using a Page Rank style centrality score might work better in this case:

https://github.com/julienledem/Pig-scripting-examples/tree/master/Page%20Rank
https://github.com/mesos/spark/blob/master/bagel/src/main/scala/spark/bagel/examples/WikipediaPageRank.scala