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Apache Lucene FlexibleScoring with IndexDocValues

During GoogleSummerOfCode 2011 David Nemeskey, PhD student, proposed to improve Lucene’s scoring architecture and implement some state-of-the-art ranking models with the new framework. Prior to this and in all Lucene versions released so far the Vector-Space Model was tightly bound into Lucene. If you found yourself in a situation where another scoring model worked better for your […]

IndexDocValues – their applications

From a user’s perspective Lucene’s IndexDocValues is a bunch of values per document. Unlike Stored Fields or FieldCache, the IndexDocValues’ values can be retrieved quickly and efficiently as Simon Willnauer describes in his first IndexDocValues blog post. There are many applications that can benefit from using IndexDocValues for search functionality like flexible scoring, faceting, sorting, […]