Refactor OAI-PMH online/offline crawling, XML crawling
Redundant code etc.
(from redmine: issue id 530, created on 2018-01-22tgradl, closed on 2018-01-24)
Redundant code etc.
(from redmine: issue id 530, created on 2018-01-22tgradl, closed on 2018-01-24)