# Package org.apache.lucene.backward_codecs

package org.apache.lucene.backward_codecs
Common APIs for use by backwards compatibility codecs.

- Related Packages
  Package
  Description
  org.apache.lucene.backward_codecs.compressing
  Compressing helper classes.
  org.apache.lucene.backward_codecs.lucene100
  Lucene 10.0 file format.
  org.apache.lucene.backward_codecs.lucene101
  Lucene 10.1 file format.
  org.apache.lucene.backward_codecs.lucene50
  Lucene 5.0 file format.
  org.apache.lucene.backward_codecs.lucene60
  Lucene 6.0 file format.
  org.apache.lucene.backward_codecs.lucene70
  Components from the Lucene 7.0 index format.
  org.apache.lucene.backward_codecs.lucene80
  Components from the Lucene 8.0 index format.
  org.apache.lucene.backward_codecs.lucene84
  Lucene 8.4 file format.
  org.apache.lucene.backward_codecs.lucene86
  Lucene 8.6 file format.
  org.apache.lucene.backward_codecs.lucene87
  Lucene 8.7 file format.
  org.apache.lucene.backward_codecs.lucene90
  Lucene 9.0 file format.
  org.apache.lucene.backward_codecs.lucene91
  Lucene 9.1 file format.
  org.apache.lucene.backward_codecs.lucene912
  Lucene 9.12 file format.
  org.apache.lucene.backward_codecs.lucene92
  Lucene 9.2 file format.
  org.apache.lucene.backward_codecs.lucene94
  Lucene 9.4 file format.
  org.apache.lucene.backward_codecs.lucene95
  Lucene 9.5 file format.
  org.apache.lucene.backward_codecs.lucene99
  Lucene 9.9 file format.
  org.apache.lucene.backward_codecs.packed
  Legacy PackedInts methods
  org.apache.lucene.backward_codecs.store
  store helper
- Classes
  Class
  Description
  Placeholder
  Remove this file when adding back compat codecs