[NTG-context] Integral limits

Hi, In MkII, it was possible to change the limits on integrals using \setupmathematics[integral=...] % limits, nolimits, displaylimits that would affect how \int, \iint, \iiint, \oint, etc behaved. I can see two ways of definining a similar feature in MkIV. 1. Define \intop, \iintop, etc in char-def.lua and then somewhere define: \define\int{\intop\intlimits} \define\iint{\intop\intlimits} etc. 2. Define a new mathclass "intop" and use that in char-def.lua. Then, in the appropriate math-*.lua file, map intop to the appropriate macro. What would be the best way to go? Thanks, Aditya