Element structure after the pre-Baseline-2 merge

The main branch has versions 0 through 5; the major branch has versions 0 through 4. On the main branch, version 1 is labeled R2_BL1 and starts a merge arrow to version 1 on the major branch; version 3 ends a merge arrow from a version 1 that is labeled R1.0.2 but whose branch is not shown; version 4 is labeled R2_BL2; and version 5 ends a merge arrow from version 4 on the major branch. Without a branch, a version 1 is labeled R1.0.2 and starts a merge arrow to version 3 on the main branch. On the major branch, version 1 ends a merge arrow from version 1 on the main branch, and version 4 starts a merge arrow to version 5 on the main branch.