> Am 01.08.2020 um 13:22 schrieb Henning Hraban Ramm <texml@fiee.net>:
>
> Hi,
>
> besides the CG journal I’m working on a scientific biography with huge person and locality indexes (named Person and Locality for the examples).
>
> In many cases, the author wants additional information in the index, e.g.
>
> \Locality{Altona (Hamburg)}
> \Locality{Breslau (pol. Wrocław)}
> or
> \Person{Arends, Katharina (née Schoemaker)}
> \Person{Wilhelm II. (Kaiser)}
>
> Now, I need that consistent and I don’t want to type these complicated entries every time.
>
> I’m looking for a good way to handle this – maybe a lookup table in Lua, so that
> \LookupPerson{Willy II}
> would call a Lua function that returns
> \Person{Wilhelm II. (Kaiser)}
> ?
>
> Or is there already something in place that I overlooked, like
> \OverwriteIndexEntry{Hraban}{Ramm, Henning Hraban}
> ?

I came up with:

\startluacode
user.Lookups = {
  ["Albano"] = "Albano (Provinz Rom)",
  ["Altona"] = "Altona (Hamburg)",
  ["Aurich"] = "Aurich (Ostfriesland)"
}

function user.Lookup(Name)
  local Res = user.Lookups[Name]
  if Res then
    return context(Res)
  else
    return context(Name)
  end
end
\stopluacode

\def\Ort#1{\index{\ctxlua{user.Lookup("#1")}}}

\starttext

\Ort{Albano}
\Ort{Altona}
\Ort{Aurich}
\strut\page

\placeindex

\stoptext


The lookup works so far, but all the entries get sorted unter C (because of \ctxlua).

I remember I had the same problem with other macros (like \index{\emph{bla}}), but can’t find a solution in my usual sources.


Hraban

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