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./unit: 'seconds' (text attr)
./full_word: N x M uint8, where M is the number of bytes needed to fit the whole ttl word.
./schema_id: 'openephys:full_word' (text attr)
./oe_extra_info./schema_id: 'openephys:<channel_info>/'
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./help: 'Stores arbitrary binary data' (attr, text)
./data: N events x LM lenth of data, any kind of numeric type.
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