- Document-at-a-time (DAAT) retrieval for large indices
- Refactored tokenisation for enhanced multi-language support
- Upgraded Hadoop support to version 0.20
- Synonym support in query language and retrieval
- Out-of-the box indexing support for query-biased summaries and improved example web-based interface
- New, 2nd generation DFR models as well as other recent effective information-theoretic models
- Fully revised and improved documentation
- Many more JUnit tests (now 300+)
Many thanks to everyone at the TerrierTeam and all Terrier contributors for their hard work making this release possible!