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%
% This file demonstrates indexing with the 'index' package.
% This file is processed as follows:
%
% latex file
% bibtex/biber file
% latex file
% makeindex -o file.ind file.idx (= makeindex file)
% makeindex -o file.nnd file.ndx
% makeindex -o file.tnd file.tdx
% latex file
%
% Note that the file name suffix may be omitted. It's 'latex file'
% and not 'latex file.tex'. Also note that '-t <file>' is optional.
%
\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
%
% The 'index' package provides advanced indexing facilities with
% support for multiple indexes.
\usepackage{index}
\usepackage[american]{babel}
\usepackage{csquotes}
%
% We set the 'indexing' package option and use the 'authortitle'
% style in this example.
\usepackage[indexing,style=authortitle,autolang=hyphen,backend=biber]{biblatex}
\addbibresource{biblatex-examples.bib}
%
% We want three indexes: a general index, an index of names, and an
% index of titles. They are defined by way of \newindex, see the
% documentation of the 'index' package for details.
\newindex{default}{idx}{ind}{Subject Index}
\newindex{names}{ndx}{nnd}{Name Index}
\newindex{titles}{tdx}{tnd}{Title Index}
%
% We need to redefine some index formatting directives such that
% biblatex adds names and titles to separate indexes. All names
% should go to the name index, hence we simply redefine the default
% index formatting directive for names. The default definition,
% which is found in biblatex.def, looks like this:
%
% \DeclareIndexNameFormat{default}{%
% \usebibmacro{index:name}{\index}{#1}{#3}{#5}{#7}%
% }
%
% As you can see, the data is simply passed on to a 'bibmacro' which
% takes care of the formatting of the name. The definition of the
% bibmacro, which is also found in biblatex.def, is not relevant in
% our example because all we want to do is change or rather extend
% the \index command, which happens to be the first argument of the
% 'index:name' bibmacro.
%
\makeatletter
\@ifpackageloaded{biblatex_legacy}
{\DeclareIndexNameFormat{default}{%
\usebibmacro{index:name}{\index[names]}{#1}{#3}{#5}{#7}}}
{\DeclareIndexNameFormat{default}{%
\nameparts{#1}%
\usebibmacro{index:name}{\index[names]}
{\namepartfamily}
{\namepartgiven}
{\namepartprefix}
{\namepartsuffix}}}
\makeatother
%
% Titles are handled in a similar way. The formatting directive we
% need to modify is 'indextitle'. It's default definition looks like
% this:
%
% \DeclareIndexFieldFormat{indextitle}{%
% \usebibmacro{index:title}{\index}{#1}%
% }
%
% We modify it such that the \index command writes to the index of
% titles:
%
\DeclareIndexFieldFormat{indextitle}{%
\usebibmacro{index:title}{\index[titles]}{#1}%
}
%
% That's it as far as splitting the index is concerned. Let's have a
% look at some other facilities you may want to customize. By
% default, biblatex will index the author or editor and the title of
% all references. This behavior may be modified as desired. The
% indexing facilities are not hard-coded. All standard styles which
% ship with this package call two 'bibmacros' which handle the
% indexing. These macros are called 'citeindex' and 'bibindex', both
% of which are defined in biblatex.def. The former handles indexing
% in citations, the latter in the bibliography. Their default
% definitions are as follows:
%
% \newbibmacro*{citeindex}{%
% \ifciteindex
% {\indexnames{labelname}%
% \indexfield{indextitle}}
% {}}
%
% \newbibmacro*{bibindex}{%
% \ifbibindex
% {\indexnames{labelname}%
% \indexfield{indextitle}}
% {}}
%
% The 'labelname' field is a copy of the 'author' field, if there is
% an author, or a copy of the 'editor' field otherwise. 'indextitle'
% is the 'indextitle' field, if defined in the bib file, or a copy
% of the 'title' field otherwise.
%
% The mechanism works like this: the \indexnames and \indexfield
% fields tell biblatex which data to add to the index, the indexing
% directives tell it how to index the data.
%
% The default settings should be fine in most cases. As an example,
% we will modify them here such that author, editors, translators,
% and commentators in the bibliography are indexed:
%
\renewbibmacro*{bibindex}{%
\ifbibindex
{\indexnames{author}%
\indexnames{editor}%
\indexnames{translator}%
\indexnames{commentator}%
\indexfield{indextitle}}
{}}
%
\begin{document}
\section*{Indexing with the \texttt{index} package}
% We add the contents of the entire bib file to the bibliography.
% Note that \nocite does not add anything to the index on its own.
\nocite{*}
% We cite a few items. These citations will be added to the index.
\cite{piccato,gaonkar,malinowski,coleridge,gerhardt,cicero}
% We also add an explicit index entry.
\index{Example entry}
\clearpage
% We print the printbibliography...
\printbibliography
% ...and the indexes
\raggedright
\printindex % the general index
\printindex[names] % the name index
\printindex[titles] % the title index
\end{document}
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