# Deprecated API

## Contents

- Deprecated Classes

- Deprecated Classes
  Class and Description
  org.apache.lucene.codecs.lucene50.Lucene50SegmentInfoFormat Only for reading old 5.0-6.0 segments
  org.apache.lucene.codecs.lucene54.Lucene54DocValuesFormat Use `Lucene70DocValuesFormat`.
  org.apache.lucene.codecs.lucene60.Lucene60Codec Only for 6.0 back compat

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