On 2013-11-07 honyk wrote:

while there is a sorting parameter for the primary index entry: \index[primary]{>primary<}

I cannot find any method how to define 'sort as' parameter for next two levels: \index{primary+>aaa<} \index{primary+bbb}

I've tried '+' analogy and it seems to be working! \index[+aaa]{primary+>aaa<} \index{primary+bbb} \index{brimary+ccc} \index[+bbb]{brimary+>bbb<} \index[+aaa]{brimary+>aaa<} It would be nice to mention this possibility in the wiki: http://wiki.contextgarden.net/Registers Jan