# Package org.apache.lucene.codecs.lucene90

Lucene 9.0 file format.

- Class Summary
  Class | Description
  --- | ---
  DeflateWithPresetDictCompressionMode | A compression mode that trades speed for compression ratio.
  IndexedDISI | Disk-based implementation of a `DocIdSetIterator` which can return the index of the current document, i.e.
  Lucene90CompoundFormat | Lucene 9.0 compound file format
  Lucene90DocValuesFormat | Lucene 9.0 DocValues format.
  Lucene90FieldInfosFormat | Lucene 9.0 Field Infos format.
  Lucene90LiveDocsFormat | Lucene 9.0 live docs format
  Lucene90NormsFormat | Lucene 9.0 Score normalization format.
  Lucene90PointsFormat | Lucene 9.0 point format, which encodes dimensional values in a block KD-tree structure for fast 1D range and N dimensional shape intersection filtering.
  Lucene90PointsReader | Reads point values previously written with `Lucene90PointsWriter`
  Lucene90PointsWriter | Writes dimensional values
  Lucene90PostingsFormat | Lucene 5.0 postings format, which encodes postings in packed integer blocks for fast decode.
  Lucene90PostingsFormat.IntBlockTermState | Holds all state required for `Lucene90PostingsReader` to produce a `PostingsEnum` without re-seeking the terms dict.
  Lucene90PostingsReader | Concrete class that reads docId(maybe frq,pos,offset,payloads) list with postings format.
  Lucene90PostingsWriter | Concrete class that writes docId(maybe frq,pos,offset,payloads) list with postings format.
  Lucene90SegmentInfoFormat | Lucene 9.0 Segment info format.
  Lucene90StoredFieldsFormat | Lucene 9.0 stored fields format.
  Lucene90TermVectorsFormat | Lucene 9.0 `term vectors format`.
  LZ4WithPresetDictCompressionMode | A compression mode that compromises on the compression ratio to provide fast compression and decompression.

- Enum Summary
  Enum | Description
  --- | ---
  Lucene90StoredFieldsFormat.Mode | Configuration option for stored fields.