# Package org.apache.poi.hdgf.chunks

- Class Summary
  Class | Description
  --- | ---
  Chunk | Base of all chunks, which hold data, flags etc
  Chunk.Command | A command in the visio file.
  ChunkFactory | Factor class to create the appropriate chunks, which needs the version of the file to process the chunk header and trailer areas.
  ChunkFactory.CommandDefinition | The definition of a Command, which a chunk may hold.
  ChunkHeader | A chunk header
  ChunkHeaderV11 | A chunk header from v11+
  ChunkHeaderV4V5 | A chunk header from v4 or v5
  ChunkHeaderV6 | A chunk header from v6
  ChunkSeparator | A separator between the trailer of one chunk, and the header of the next one
  ChunkTrailer | A trailer that follows a chunk

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