Re: [NTG-context] Is there a way to centrally add a list of indexed items to a sub category?

15 May 2023


      On 5/15/2023 3:37 AM, Joel via ntg-context wrote:
...
I have a document like this:
    \starttext
         \index{dogs}
        \index{cats}
        \index{flowers}
        \index{snails}
        \index{trees}
        \placeindex
    \stoptext
As I understand, if you use \index{animals+dogs}, it will place dogs as 
a sub-category of dogs.
Is there any way to control this centrally, for instance:
\addtosub[animals]{dogs, cats, snails}
\addtosub[plants]{flowers, trees}
Such a way would make it so \index{dogs} places an entry for "dog" under 
"d" and "animals --> dogs" under "a".
\starttexdefinition protected IndexA#1#2
     \index{#2}
     \doloopoverlist {#1} {
         \index{##1+#2}
     }
\stoptexdefinition

\starttexdefinition tolerant protected IndexB[#1]#:#*#2
     \index{#2}
     \doloopoverlist {#1} {
         \index{##1+#2}
     }
\stoptexdefinition

\starttext
     a\IndexA{animals}{dogs}
     a\IndexA{animals}{cats}
     a\IndexA{plants}{flowers}
     a\IndexA{animals,small}{snails}
     a\IndexA{plants,huge}{trees}
     \page
     b\IndexB[animals]      {dogs}
     b\IndexB[animals]      {cats}
     b\IndexB[plants]       {flowers}
     b\IndexB[animals,small]{snails}
     b\IndexB[plants,huge]  {trees}
     \page
     c\IndexB{dogs}
     c\IndexB{cats}
     c\IndexB{flowers}
     c\IndexB{snails}
     c\IndexB{trees}
     \page
     \placeindex
\stoptext


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