Instead of separating series in a merged xml (separate issue), one could create a new block by cloning the blocks used in the anchoring and the xml file base on the merged blocks would fit.
Cloning of blocks is entirely internal to Navigator, @darwinjob can help with it. Issue is moved here as GitHub apparently does not allow transfer between public and private repositories.
Instead of separating series in a merged xml (separate issue), one could create a new block by cloning the blocks used in the anchoring and the xml file base on the merged blocks would fit.