Looking for continuous data patterns, concepts, and pitfalls

Looking for continuous data patterns, concepts, and pitfalls

First I apologize if this is the incorrect place to ask this kind of
question. In that case I'd like to change my question to "Where I should
ask this type of question."
Take Facebook's news feed. It's a continuous feed of data that's broken up
into posts, but is there any programming and storage precedent for storage
and retrieval of data that isn't so discreetly broken up? An example of
storing data that's continuous and broken up on arbitrary lines that are
created by the programmer rather than the data itself.
It could be broken up by size of data, lines of text, etc. and is
retrievable chronologically from first line to last and vice versa.
Hope that makes sense and thank you for any insights you may provide.