tree ed5d81d2bb9d6ddbd6b9617821a8b9119fd6c95a
parent ec2e69d848b5dc0f93d0236ab57f9a19f19ec363
author Stephan Merkli <stephan.merkli@bsi-software.com> 1617089143 +0200
committer Stephan Merkli <stephan.merkli@bsi-software.com> 1619632717 +0200

Data object migration support: add initial contribution

A persisted data object (in database or via an export feature)
may undergo structural changes during its lifetime. To allow
processing an older version of such a data object it must be
first migrated to the newest structure.

Change-Id: I258cce3dccf192a770919b3e1b6dd18149dc8f8f