Step 3 of 9 in Making a new edition
Sample data, read from content-sdk
The edition's own copy of a resource
The region teaches its own history, so Humanities (Regional) needs its own Timeline Teach Book.
Ben made the edition its own copy and pointed the edition's row at it. Changes to the copy stay in the edition; the original is untouched.
Try it: select Timeline Teach Book in Humanities (Regional).
Humanities and Humanities (Another region) still place the original. The regional edition's copy holds the region's file.