How do we decide which smallest unit? For text collaboration, should it be a word, a paragraph?
Will there be performance problems if the block is too small? But it can be more flexible.
I think the question is “wrong” and that this is not a candidate for the relational model.The entire stream can be stored in a BLOB, such as storage / field, and you will use specialized (full-text) indexing. Maybe this can help?
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