Dear list, Motivated by this question on TeX.SX https://tex.stackexchange.com/questions/369778 I took a look at the \definenamespace mechanism in ConTeXt. It seems that it permits a syntax like \define<NAMESPACE>[...,...][...=...,...=...] where you can provide a list of instances to define in the first argument.  I don't know about any \define command in ConTeXt that would permit that and the implementation in mult-aux.mkiv does not even support that properly.  My approach would actually be to remove the list option from \definenamespace completely. Cheers, Henri