The following classes implement different MDF version4 blocks.
asammdf.v4_blocks.AttachmentBlock
asammdf.v4_blocks.Channel
asammdf.v4_blocks.ChannelConversion
asammdf.v4_blocks.ChannelGroup
asammdf.v4_blocks.DataGroup
asammdf.v4_blocks.DataList
asammdf.v4_blocks.DataBlock
asammdf.v4_blocks.FileIdentificationBlock
asammdf.v4_blocks.HeaderBlock
asammdf.v4_blocks.SourceInformation
asammdf.v4_blocks.FileHistory
asammdf.v4_blocks.TextBlock