Support headers above processing root
- Example EAD
- Read header and make accessible with each resource
- Optional property in data model (use processing header)
- Provide support in DME, then implement for GS (task #1142)
(from redmine: issue id 1143, created on 2018-08-11tgradl, closed on 2018-08-21)
- Relations:
- relates #1142