Copied from ~Jp (World's Edge Server Engineer):
Hey everyone!
With RoR we're making some changes that affect the APIs regarding lobbies, spectating and match history. The changes are mainly pertaining to the options string, civ IDs, match type IDs and map IDs.
I've decided to make a mapping to allow you to more easily update your resources. This mapping is constructed in the following way:
<Mapping Type>.json
{
"Object Name": {
"1": <ID in Dynasties of India>,
"2": <ID in RoR>,
"3+": <Reserved for future updates>
},
<More Objects>
}