Good morning. I have to typeset a document in Czech with index. How can I make the ConTeXt to sort it according to a Czech custom/norm? I tried to learn it from the ConTeXt source but I failed. Is there any help/documentation for it? To show what I need, see this please: 1) accutes: A and Aaccute goes in one section, but Aacute is after A (the same holds for E/Eacute, I/..., O/..., Y/...; U is special, since there is U, Uaccute and Uring). 2) carons: Ccaron, Dcaron etc. have thier own section. So there is one section for C, one for Ccaron, then is there D, then Dcaron etc. 3) Ecaron is no problem, since no Czech word can begin with it. But it goes in one section with E and Eaccute in a following order: E, Eaccute and Ecaron. 4) CH is in Czech supposed to be one letter. It stands after H. (There are some words where CH is two letters, but it can be ignored.) 5) There are much more rules, but they can be hardly algorithmized since they depend on a meaning. I can ignore them. Can some of you send me an example how to do it? Then I would try to implement it myself. Many thanks and greetings. Michal Kvasnicka