On Feb 11, 2010, at 6:17 PM, Hans Hagen wrote:

> are you sure that that's the convention for english? it's easy to change it 
> ...
> 
> \startluacode
> sorters.mappings['en'] = {
>    ["a"] =  2, ["b"] =  4, ["c"] =  6, ["d"] =  8, ["e"] = 10,
>    ["f"] = 12, ["g"] = 14, ["h"] = 16, ["i"] = 18, ["j"] = 20,
>    ["k"] = 22, ["l"] = 24, ["m"] = 26, ["n"] = 28, ["o"] = 30,
>    ["p"] = 32, ["q"] = 34, ["r"] = 36, ["s"] = 38, ["t"] = 40,
>    ["u"] = 42, ["v"] = 44, ["w"] = 46, ["x"] = 48, ["y"] = 50,
>    ["z"] = 52,
>    ["A"] =  1, ["B"] =  3, ["C"] =  5, ["D"] =  7, ["E"] =  9,
>    ["F"] = 11, ["G"] = 13, ["H"] = 15, ["I"] = 17, ["J"] = 19,
>    ["K"] = 21, ["L"] = 23, ["M"] = 25, ["N"] = 27, ["O"] = 29,
>    ["P"] = 31, ["Q"] = 33, ["R"] = 35, ["S"] = 37, ["T"] = 39,
>    ["U"] = 41, ["V"] = 43, ["W"] = 45, ["X"] = 47, ["Y"] = 49,
>    ["Z"] = 51,
> }
> \stopluacode
> 
> \starttext
>    \index{Aardvark}Aardvark \par
>    \index{azygous}azygous
>    \placeregister[index][n=1]
> \stoptext

No, I'm not sure at all. All I can say is that a quick check in my scholarly 
books didn't bring up a single example where uppercase and lowercase were 
treated differently. If I apply your code, I will have the same problem with 
Azygous -> aardvark. How would I write the table so that lowercase and 
uppercase are not distinguished at all? I tried

\startluacode
sorters.mappings['en'] = {
   ["a"] =  1, ["b"] =  2, ["c"] =  3, ["d"] =  4, ["e"] = 5,
   ["f"] = 6, ["g"] = 7, ["h"] = 8, ["i"] = 9, ["j"] = 10,
   ["k"] = 11, ["l"] = 12, ["m"] = 13, ["n"] = 14, ["o"] = 15,
   ["p"] = 16, ["q"] = 17, ["r"] = 18, ["s"] = 19, ["t"] = 20,
   ["u"] = 21, ["v"] = 22, ["w"] = 23, ["x"] = 24, ["y"] = 25,
   ["z"] = 26,
}
\stopluacode

but that didn't work.

Thomas
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