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(texinfo)Combining Indices

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Combining Indices
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  Sometimes you will want to combine two disparate indices such as
functions and concepts, perhaps because you have few enough of one of
them that a separate index for them would look silly.

  You could put functions into the concept index by writing `@cindex'
commands for them instead of `@findex' commands, and produce a
consistent manual by printing the concept index with the title
`Function and Concept Index' and not printing the `Function Index' at
all; but this is not a robust procedure.  It works only if your
document is never included as part of another document that is designed
to have a separate function index; if your document were to be included
with such a document, the functions from your document and those from
the other would not end up together.  Also, to make your function names
appear in the right font in the concept index, you would need to
enclose every one of them between the braces of `@code'.

syncodeindex

How to merge two indices, using `@code'

font for the merged-from index.

synindex

How to merge two indices, using the

default font of the merged-to index.