| org.apache.lucene.codecs.bitvectors | 
 A simple bit-vector format that supports hamming distance and storing vectors in an HNSW graph 
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| org.apache.lucene.codecs.blockterms | 
 Pluggable term index / block terms dictionary implementations. 
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| org.apache.lucene.codecs.blocktreeords | 
 Same postings format as Lucene50, except the terms dictionary also supports ords, i.e. 
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| org.apache.lucene.codecs.bloom | 
 Codec PostingsFormat for fast access to low-frequency terms such as primary key fields. 
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| org.apache.lucene.codecs.memory | 
 Term dictionary, DocValues or Postings formats that are read entirely into memory. 
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| org.apache.lucene.codecs.simpletext | 
 Simpletext Codec: writes human readable postings. 
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| org.apache.lucene.codecs.uniformsplit | 
 Pluggable term index / block terms dictionary implementations. 
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| org.apache.lucene.codecs.uniformsplit.sharedterms | 
 Pluggable term index / block terms dictionary implementations. 
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