This feature allows the ability to easily drag and drop database records between projects. In general, the design for all trees, when you drag something from one tree of a project and drop onto another tree of another project, is to copy the record or move the record if it already exists in the destination.
Drag and Drop allows any tree node, and its child nodes, to be dragged in the following ways:
Remote to local (most typical use case)
Remote to Remote
Local to Remote
Records that are copied or moved, would include a tag called origRef that holds the original ID they have in the project they were being dragged from. As well as archivedRefs tag, that contains the original ID of the references.