What is meant by "streams" here?

Question

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Future refining capacity needs to be considered in terms of both the adequacy of secondary processes - for example, to upgrade heavy *streams* and to meet tight targets for sulphur - and crude distillation capacity

Answer 1

I think we are talking here about "oil streams", i.e. flows of oil.

Answer 2

I only meant that STREAMS is what you get with the current versions from
ATT, without the cost of re-porting to each new AT&T release, you
don't get sockets or anything else. A vendor that must rely on ATT
to provide a base, a strategy based on sockets does not seem appropriate
in the long term.