On 2013-06-09 honyk wrote:

in my book I want to place the index (aka register) of places. Some of them are mentioned very often (>10).

In one old book I've found the following solution for this: in the index there are first three page references listed for that index entry followed by 'and many' phrase.

Can something like this be done in the ConTeXt (MkIV)?

I found an elegant way for this: \defineprocessor[many][right= and many] This processor is then applied just for the last index entry page reference: \index[many->]{primary} This can be automated in my system. Wow, great! Jan