# Package org.apache.lucene.codecs.lucene99

package org.apache.lucene.codecs.lucene99
Lucene 9.9 file format.

Related Packages
Package
Description
org.apache.lucene.codecs
Codecs API: API for customization of the encoding and structure of the index.
Classes
Class
Description
Lucene99FlatVectorsFormat
Lucene 9.9 flat vector format, which encodes numeric vector values
Lucene99FlatVectorsReader
Reads vectors from the index segments.
Lucene99FlatVectorsWriter
Writes vector values to index segments.
Lucene99HnswScalarQuantizedVectorsFormat
Lucene 9.9 vector format, which encodes numeric vector values into an associated graph connecting the documents having values.
Lucene99HnswVectorsFormat
Lucene 9.9 vector format, which encodes numeric vector values into an associated graph connecting the documents having values.
Lucene99HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene99HnswVectorsWriter
Writes vector values and knn graphs to index segments.
Lucene99ScalarQuantizedVectorScorer
Optimized scalar quantized implementation of `FlatVectorsScorer` for quantized vectors stored in the Lucene99 format.
Lucene99ScalarQuantizedVectorsFormat
Format supporting vector quantization, storage, and retrieval
Lucene99ScalarQuantizedVectorsReader
Reads Scalar Quantized vectors from the index segments along with index data structures.
Lucene99ScalarQuantizedVectorsWriter
Writes quantized vector values and metadata to index segments.
Lucene99SegmentInfoFormat
Lucene 9.9 Segment info format.
OffHeapQuantizedByteVectorValues
Read the quantized vector values and their score correction values from the index input.
OffHeapQuantizedByteVectorValues.DenseOffHeapVectorValues
Dense vector values that are stored off-heap.