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Defining New Indices

In addition to the predefined indices, you may use the @defindex and @defcodeindex commands to define new indices. These commands create new indexing @-commands with which you mark index entries. The @defindex command is used like this:

@defindex name

The name of an index should be a two letter word, such as `au'. For example:

@defindex au

This defines a new index, called the `au' index. At the same time, it creates a new indexing command, @auindex, that you can use to make index entries. Use the new indexing command just as you would use a predefined indexing command.

For example, here is a section heading followed by a concept index entry and two `au' index entries.

@section Cognitive Semantics
@cindex kinesthetic image schemas
@auindex Johnson, Mark
@auindex Lakoff, George

(Evidently, `au' serves here as an abbreviation for "author".) Texinfo constructs the new indexing command by concatenating the name of the index with `index'; thus, defining an `au' index leads to the automatic creation of an @auindex command.

Use the @printindex command to print the index, as you do with the predefined indices. For example:

@node Author Index, Subject Index, , Top
@unnumbered Author Index

@printindex au

The @defcodeindex is like the @defindex command, except that, in the printed output, it prints entries in an @code font instead of a roman font. Thus, it parallels the @findex command rather than the @cindex command.

You should define new indices within or right after the end-of-header line of a Texinfo file, before any @synindex or @syncodeindex commands (see section The Texinfo File Header).

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