register entries in footnotes

["Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>]

A similar question has been asked three years ago, and Rik Kabel posted 
a partial solution, adapted here:

\defineprocessor [Footnote] [right={ n}]

\define[1]
   \fnindex{\index[Footnote->]{#1}}

\starttext

This is a sentence with a term in the index: cat\index{cat}. This 
sentence also has an indexed term, dog\index{dog}, as well as a 
footnote.\footnote{The footnote also contains an indexed term, 
mouse.\fnindex{mouse}}

\page

\placeregister [index]

\stoptext

And about a year ago, Hans made a different suggestion to my own 
question; however, I didn't realize then that it was not what I was 
looking for:

\starttext

           Test1: \index{cat}cat.
\footnote{Test2: \index{mouse}mouse.}
\footnote[note:cat]{Test3: \index[cat]{cat in \in{note}[note:cat]}cat.}

\page

\placeregister [index]
\stoptext

This creates two index entries for cat, which is not the intended result.

My questions are:

1. I would like to have the footnote number appear in the index, so it 
says something like "cat 1 n. 1." Is that possible?

2. Is it necessary to define an extra command for index entries in 
footnotes? Is context clever enough to know that it's processing a 
footnote, so one could write a condition such as (pseudocode):

\define [1]
   \myindex
   {\infinfootnoteelse
     {\index[Footnote]->{#1}}
     {\index{#1}}}

Thanks a lot, have a good Sunday!

Thomas
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