A stream is a "smart branch" in Perforce. This is an alternative to the classical depot type that is using branch mapping to map files between the depot and the local file system.
A stream is a "smart branch" in perforce. This is an alternative to the classical depot type that is using branch mapping to map files between the depot and the local file system. The choice of using stream or not is done at the depot creation and can't be altered later. This prevent the use of branch mapping. (or rather the branch mapping is deduced from the stream configuration)
By default, the integrations of a stream (copy or merge) are restricted to the parent or child of the stream.