Hello. I'm looking at using OP for an Ars Magica game. In the game, years (probably decades) will pass and I'll likely have several NPCs having wikis. What I'm wondering is if there is a a method for creating fixed variables for the campaign that could be invoked in a textile method for doing math on those variables. In particular, it would be very helpful if there was some place where the campaign's current year could be updated that would cause the current age to be updated for all the NPCs, rather than having to update each person individually.
Thanks in advance,