You can create the following types of streams:
An empty stream that initially contains no items.
Based on a baseline.
Based on any version of another stream. The new stream is a child of the parent stream from which it was created.
Based on the items that are currently under work in your workspace. The new stream includes the item revisions from the current stream in Dimensions, not any local changes that have not yet been checked in or delivered to Dimensions. For example, if you updated your workspace with the most recent revision (1.5) of readme.txt and have made some local edits to this file but have not yet delivered those edits to a new revision in Dimensions (1.6), the new branch stream will include revisions up to 1.5.
A personal stream, a private development branch that is only visible to the originator.