Update persistence layer to support new metastructure for mapped concepts
reference tree?!
(from redmine: issue id 538, created on 2018-01-22tgradl, closed on 2018-01-22)
- Relations:
- relates #536 (closed)
reference tree?!
(from redmine: issue id 538, created on 2018-01-22tgradl, closed on 2018-01-22)