Linuxeden开源社区Apache Lucene 6.5.0 发布了。
该版本包含许多错误修复，优化和改进，其中一些值得关注的如下：
- It is now possible filter out duplicates in the NRT suggester
- SimpleQueryString now supports default fuziness
- IndexWriter can return the list of visible field names
- DisjunctionScorer now supports returning the matching children clauses
- A new FunctionScoreQuery that modifies the internal query’s score using the per-document values
- A new FunctionMatchQuery that returns any documents with a value that matches a predicate
- A new WordDelimiterGraphFilter that outputs a correct graph structure for multi-token expansion at query time
- A new PatternTokenizer that uses Lucene’s RegExp implementation
- RangeFieldQuery now supports CROSSES relation
- A new IndexOrDocValuesQuery that uses either an index (points or terms) or doc values in order to run a (range, geo box and distance) query,depending which one is more efficient
Lucene 是 Apache 软件基金会一个开放源代码的全文检索引擎工具包，是一个全文检索引擎的架构，提供了完整的查询引擎和索引引擎，部分文本分析引擎。Lucene 的目的是为软件开发人员提供一个简单易用的工具包，以方便的在目标系统中实现全文检索的功能，或者是以此为基础建立起完整的全文检索引擎。
转自 http://www.oschina.net/news/83291/apache-lucene-6-5-0-released