icite/icite.dtx

% \iffalse meta-comment
% vim: textwidth=75
%<*internal>
\iffalse
%</internal>
%<*readme>
---
author:
- Robert Alessi
title: 'The icite package – README file'
---

Overview
========

`icite` is designed to produce from BibTeX or BibLaTeX bibliographical
databases the different indices of authors and works cited which are
called _indices locorum citatorum_. It relies on a specific
`\icite` command and can operate with either BibTeX or BibLaTeX.

License and disclamer
=====================

icite – Indices locorum citatorum

Copyright ⓒ 2019 Robert Alessi

Please send error reports and suggestions for improvements to Robert
Alessi:

-   email: <alessi@robertalessi.net>

-   website: <http://www.robertalessi.net/icite>

-   comments, feature requests, bug reports:
    <https://gitlab.com/ralessi/icite/issues>

This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License for more details.

You should have received a copy of the GNU General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.

This release of icite consists of the following source files:

-   `icite.dtx`

-   `icite.ins`

-   `Makefile`

License applicable to the documentation 
---------------------------------------

Copyright ⓒ 2019 Robert Alessi

The documentation file `icite.pdf` that is generated from the
`icite.dtx` source file is licensed under the Creative Commons
Attribution-ShareAlike 4.0 International License. To view a copy of this
license, visit <http://creativecommons.org/licenses/by-sa/4.0/> or send
a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.

Installation 
============

1.  Run `'latex icite.ins'` to produce the `icite.sty`
    file;

2.  To finish the installation you have to move the `icite.sty` file into
    a directory where LaTeX can find them. See the FAQ on `texfaq.org`
    at <https://texfaq.org/FAQ-inst-wlcf> for more on this.


Development, Git Repository 
===========================

Browse the code 
---------------

You can browse icite repository on the web:
<http://git.robertalessi.net/icite>

From this page, you can download all the releases of `icite`. For
instructions on how to install `icite`, please see above.

Comments, Feature requests, Bug Reports 
---------------------------------------

<https://gitlab.com/ralessi/icite/issues>

Download the repository 
-----------------------

`icite` development is facilitated by git, a distributed version
control system. You will need to install git (most GNU/Linux
distributions package it in their repositories).

Use this command to download the repository

    git clone http://git.robertalessi.net/icite

A new directory named icite will have been created, containing
`icite`.

Git hosting 
-----------

Make an account on <https://gitlab.com> and navigate (while logged in)
to <https://gitlab.com/ralessi/icite>. Click *Fork* and you will
have in your account your own repository of `icite` where you will
be able to make whatever changes you like to.

%</readme>
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
  \expandafter\begingroup
\fi
%</internal>
%<*install>
\input docstrip.tex
\keepsilent
\askforoverwritefalse
\preamble

Copyright (C) 2019 by Robert Alessi <alessi@robertalessi.net>

Please send error reports and suggestions for improvements to Robert
Alessi <alessi@robertalessi.net>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see
<http://www.gnu.org/licenses/>.

This work consists of the file icite.dtx, icite.ins and a Makefile.
Running "make" generates the derived files README.md, icite.pdf and icite.sty.
Running "make inst" installs the files in the user's TeX tree.
Running "make install" installs the files in the local TeX tree.

\endpreamble

\usedir{tex/latex/icite}
\generate{
  \file{\jobname.sty}{\from{\jobname.dtx}{package}}
}
%</install>
%<install>\endbatchfile
%<*internal>
\usedir{source/latex/icite}
\generate{
  \file{\jobname.ins}{\from{\jobname.dtx}{install}}
}
\nopreamble\nopostamble
\usedir{doc/latex/icite}
\generate{
  \file{README.md}{\from{\jobname.dtx}{readme}}
}
\ifx\fmtname\nameofplainTeX
  \expandafter\endbatchfile
\else
  \expandafter\endgroup
\fi
%</internal>
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{icite.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{icite}
%<*package>
    [2019/03/17 v1.2 Make Indices locorum citatorum]
%</package>
%<*driver>
\documentclass{ltxdoc}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.xdy}
(merge-rule "\*" "" :eregexp)
(markup-locclass-list :open "\tabto{3.5cm}" :sep ", ")
\end{filecontents*}
\begin{filecontents*}{\jobname.bib}
@Book{Aristotle:Politica,
  title =	 {Politica},
  date =	 1964,
  author =	 {Aristotle},
  editor =	 {Ross, W. D.},
  origdate =	 1957,
  entrysubtype = {classical},
  publisher =	 {Clarendon Press},
  location =	 {Oxford}
}

@Book{Bürgel2016,
  shorttitle =	 {Ärztliches Leben\ldots},
  editortype =	 {reviser},
  editor =	 {Käs, Fabian},
  number =	 135,
  series =	 {Islamic History and Civilization},
  location =	 {Leiden},
  publisher =	 {Brill},
  date =	 2016,
  title =	 {Ärztliches Leben und Denken im arabischen
                  Mittelalter},
  author =	 {Bürgel, Johann Christoph}
}

@Software{classics,
  title =	 {The Classics package},
  subtitle =	 {Cite classic works},
  author =	 {Lourenço de Lima, Eduardo C.},
  publisher =	 {CTAN},
  url =		 {http://www.ctan.org/pkg/classics},
  date =	 {2013-02-02},
  version =	 {0.1}
}

@Article{Dols1987,
  author =	 {Dols, Michael W.},
  title =	 {The Origins of the Islamic Hospital: Myth and
                  Reality},
  shorttitle =	 {The Origins of the Islamic Hospital},
  journaltitle = {Bulletin of the History of Medicine},
  date =	 1987,
  volume =	 61,
  pages =	 {367--390}
}

@InBook{Endress1992,
  title =	 {Die Wissenschaftliche Literatur},
  date =	 1992,
  author =	 {Endress, Gerhard},
  booktitle =	 {Grundriß der arabischen Philologie},
  editor =	 {Fisher, Wolfdietrich},
  volume =	 3,
  note =	 {Supplement},
  publisher =	 {Reichert},
  location =	 {Wiesbaden},
  pages =	 {3--152}
}

@Book{IAUMuller,
  sortname =	 {{ibn abi usaybia}},
  editor =	 {Müller, August},
  author =	 {\prname{ibn 'abI 'u.saybi`aT}},
  shorteditor =	 {Müller},
  date =	 {1882/1884},
  title =	 {\arb[trans]{\uc{`u}yUn al-'anbA' fI .tabaqAt
                  al-'a.tibbA'}},
  shorttitle =	 {\arb[trans]{\uc{`u}yUn al-'anbA'}},
  shorthand =	 {\prname{ibn 'abI 'u.saybi`aT},
                  \arb[trans]{\uc{`u}yUn al-'anbA'}},
  entrysubtype = {classical},
  location =	 {Königsberg and Cairo},
  volumes =	 2
}

@Software{imakeidx,
  title =	 {The Imakeidx package},
  subtitle =	 {A package for producing multiple indexes},
  author =	 {Gregorio, Enrico and Beccari, Claudio},
  publisher =	 {CTAN},
  url =		 {http://www.ctan.org/pkg/imakeidx},
  date =	 {2016-10-15},
  version =	 {1.3e}
}

@Book{RaziShukuk,
  author =	 {\prname{al-rAziyy}, \prname{mu.hammad ibn
                  zakariyyA'}},
  title =	 {\arb[trans]{\uc{k}itAb al-^sukUk `al_A
                  \uc{^g}AlInUs}},
  indextitle =	 {\arb[trans]{\uc{^s}ukUk}},
  sortname =	 {razi},
  date =	 1993,
  shorthand =	 {\prname{al-rAziyy}, \arb[trans]{\uc{^s}ukUk}},
  editor =	 {Mehdi Mohaghegh},
  publisher =	 {International Institute of Islamic Thought and
                  Civilization},
  location =	 {Tehran},
  entrysubtype = {classical}
}

@Book{Ullmann1970,
  location =	 {Leiden},
  publisher =	 {Brill},
  title =	 {Die Medizin im Islam},
  date =	 1970,
  author =	 {Ullmann, Manfred},
}

@MVBook{al-Nadim,
  author =	 {\prname{ibn al-nadIm}},
  title =	 {\arb[trans]{\uc{f}ihrist}},
  sortname =	 {{ibn al-nadim}},
  date =	 {1871/1872},
  shorthand =	 {\arb[trans]{\uc{f}ihrist}},
  editor =	 {Flügel, Gustav},
  volumes =	 2,
  location =	 {Leipzig},
  entrysubtype = {classical}
}

@Book{al-Qifti,
  sortname =	 {{ibn al-qifti}},
  entrysubtype = {classical},
  shorthand =	 {\prname{al-qif.tiyy}, \arb[trans]{\uc{t}a'rI_h}},
  location =	 {Leipzig},
  editor =	 {Lippert, Julius},
  date =	 1903,
  title =	 {\arb[trans]{\uc{t}a'rI_h al-.hukamA'}},
  author =	 {\prname{ibn al-qif.tiyy}}
}

@Software{usebib,
  title =	 {The Usebib package},
  subtitle =	 {A simple bibliography processor},
  author =	 {Gregorio, Enrico},
  publisher =	 {CTAN},
  url =		 {http://www.ctan.org/pkg/usebib},
  date =	 {2012-04-13},
  version =	 {1.0a}
}
\end{filecontents*}
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\usepackage{fontspec}
\babelfont{rm}{Old Standard}
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\usepackage{xurl}
\usepackage{uri}
\usepackage{hyperxmp}
\usepackage{varioref}
\usepackage{latexcolors}
\usepackage[numbered]{hypdoc}
\hypersetup{unicode=true, colorlinks, allcolors=cinnamon,
  linktocpage=true, pdfauthor={Robert Alessi}, pdftitle={The
    icite package}, pdfcontactemail={alessi@robertalessi.net},
  pdfcontacturl={http://www.robertalessi.net/icite},
  pdfcopyright={Copyright (C) 2019 Robert Alessi
    <alessi@robertalessi.net>. This document is licensed under the
    Creative Commons Attribution-ShareAlike 4.0 International
    License. To view a copy of this license, visit
    http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to
    Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.},
  pdflicenseurl={https://creativecommons.org/licenses/by-sa/4.0/legalcode},
  pdfmetalang={en-US}, pdftype={Text}, pdfkeywords={bibtex, biblatex,
    indexing}}
\usepackage{amsmath}
\usepackage{cleveref}
\CodelineIndex
\usepackage[citecmd=autocite,defaultindex]{\jobname}
\IndexSubtypeAs{classical}{primary}
\bibinput{icite}
\usepackage[nonewpage,xindy]{imakeidx}
\newcommand{\donothing}[1]{}
\indexsetup{level=\donothing}
\makeindex
\makeindex[name=loccit]
\makeindex[name=primary]
\usepackage{needspace}
\usepackage{tabto}
\usepackage{classics}
\newclassic{iau}{\classicsRoman{#1}|, #1|.#1}
\newclassic{razi}{#1|.#1}
\newclassic{nadim}{\classicsRoman{#1}|.#1|, #1}
\newclassic{aristotle}{#1|\textit{#1}|#1}
\usepackage[scale=1.5]{ccicons}
\usepackage{dox}
\doxitem{Option}{option}{options}
\usepackage{enumitem}
\setlist{nosep}
\setlist[itemize]{label=\textendash}
\setlist[enumerate,1]{label=(\alph*)}
\setlist[enumerate,2]{label=\roman*.}
\usepackage[lot]{multitoc}
\usepackage{nameref}
\usepackage{csquotes}
\usepackage[style=oxnotes, hyperref=false]{biblatex}
\DeclareFieldFormat{postnote}{\mkpageprefix[pagination][\mknormrange]{#1}}
\addbibresource{icite.bib}
\usepackage{hologo,metalogox}
\usepackage{relsize}
\usepackage{units}
\usepackage{minted}
\usepackage[contents]{colordoc}
\newcommand{\package}[1]{\textsf{#1}\index{#1=#1 (package)}}
\usepackage{tikz}
\usepackage[breakable, skins, xparse, minted]{tcolorbox}
\tcbset{colback=white, boxrule=.15mm, colframe=cinnamon,
  breakable}
\newtcblisting{example}{minted options={linenos, numbersep=0mm}}
\newtcblisting{code}{minted options={linenos, numbersep=0mm}, listing
  only}
\usepackage{etoc}
\etocsettocdepth{paragraph}
\newcommand{\icitetableofcontents}{%
  \begingroup
  \etocsetstyle{section}{}{}
  {\etocsavedsectiontocline{%
      \numberline{\etocnumber}\etocname}{\etocpage}}{}
  \etocsetstyle{subsection}{}{}
  {\etocsavedsubsectiontocline{%
      \numberline{\etocnumber}\etocname}{\etocpage}}{}%
  \etocsetstyle{subsubsection}{}{}
  {\etocsavedsubsubsectiontocline{%
      \numberline{\etocnumber}\etocname}{\etocpage}}{}%
  \etocsetstyle{paragraph}{}{\leftskip2cm\rightskip 2.2em \parfillskip
    0pt plus 1fil\relax \nobreak}
  {\noindent\etocname{} \etocpage{} }{\par}%
  \etocmulticolstyle[2]{\section*{Contents}}
  \pdfbookmark[1]{Contents}{toc}
  \tableofcontents
  \endgroup}
\EnableCrossrefs
 %\CodelineIndex
\RecordChanges
 %\OnlyDescription
\begin{document}
 \DocInput{\jobname.dtx}
 \PrintChanges
 \section{Index}
 \indexprologue{Numbers written in italic refer to the page where the
   corresponding entry is described; numbers underlined refer to the
   code line of the definition; numbers in roman refer to the code
   lines where the entry is used.}
 \printindex
 %\PrintIndex
\end{document}
%</driver>
% \fi
%
% \CheckSum{0}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
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%   Grave accent  \`     Left brace    \{     Vertical bar  \|
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%   \org@changes@{v#1.\six@digits{#2}.#3=v#1.#2.#3}%
% }%
%   \newcommand*{\six@digits}[1]{%
%   \ifnum#1<100000 0\fi
%   \ifnum#1<10000 0\fi
%   \ifnum#1<1000 0\fi
%   \ifnum#1<100 0\fi
%   \two@digits{#1}%
% }%
%   \renewcommand*{\changes@}[1]{%
%   \my@changes#1.\@nil
% }%
%   \makeatother
%
% \GetFileInfo{\jobname.dtx}
% \DoNotIndex{\newcommand,\newenvironment}
% 
% \newcommand*{\NEWfeature}[1]{%
%     \hskip 1sp \marginpar{\small\sffamily\raggedright
%     New feature\\#1}}
%
% \title{\tcbox[colframe=black, enhanced, tikznode, drop lifted
% shadow, colback=white, boxrule=.25mm]{%
% The \textsf{icite} package\\
% \emph{Indices locorum citatorum}\\
% \fileversion\ --- \filedate}}
%  
% \author{Robert Alessi \\
% \href{mailto:alessi@robertalessi.net?Subject=icite package}%
% {\texttt{alessi@robertalessi.net}}}
% 
% \date{}
%
% \maketitle
% \footnotesize
% \icitetableofcontents
% \normalsize
%
% \changes{v1.00}{2019/03/07}{First public release}
%
% \begin{abstract}
%   \package{icite} is designed to produce from \hologo{BibTeX} or
%   Bib\LaTeX\ bibliographical databases the different indices of
%   authors and works cited which are called \emph{indices locorum
%   citatorum}. It relies on a specific \cs{icite} command and can
%   operate with either \hologo{BibTeX} or Bib\LaTeX.
% \end{abstract}
%
% \section*{License and disclamer}
% \addcontentsline{toc}{section}{License and disclamer}
% \subsection*{License applicable to the software}
% \label{sec:license-software}
%
% \package{icite} --- \emph{Indices locorum citatorum}\\
% Copyright \textcopyright\ 2019  Robert Alessi
%
% Please send error reports and suggestions for improvements to Robert
% Alessi:
% \begin{itemize}
% \item email: \mailto[icite package]{alessi@roberalessi.net}
% \item website: \url{http://www.robertalessi.net/icite}
% \item development: \url{http://git.robertalessi.net/icite}
% \item comments, feature requests, bug reports:
% \url{https://gitlab.com/ralessi/icite/issues}
% \end{itemize}
%
% \marginpar{\texttt{gpl3+}}
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
% General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program.  If not, see
% <http://www.gnu.org/licenses/>.
%
% This release of \package{icite} consists of the following
% source files:
% \begin{itemize}
% \item |icite.dtx|
% \item |icite.ins|
% \item |Makefile|
% \end{itemize}
% 
% \subsection*{License applicable to this document}
% \label{sec:documentation-license}
% Copyright \textcopyright\ 2019  Robert Alessi
%
% \ccbysa\marginpar{\texttt{CC BY-SA 4.0}}
% This document is licensed under the Creative Commons
% Attribution-ShareAlike 4.0 International License. To view a copy of
% this license, visit
% \url{http://creativecommons.org/licenses/by-sa/4.0/} or send a
% letter to Creative Commons, PO Box 1866, Mountain View, CA 94042,
% USA.
%
% \section{Introduction}
% \label{sec:introduction}
% Bib\LaTeX\ features a very powerful internal mechanism which
% supports indexing of citations and bibliographic entries and can be
% activated by a simple |indexing| option in the preamble. However, by
% default, only the authors and the works cited are inserted in the
% index. Furthermore, authors and works are indexed separately and
% only inserted in the global index that is generated by
% \cs{makeindex}. Another limitation is that the references are also
% excluded from the index.
%
% Notwithstanding these limitations, it is quite possible to typeset
% \emph{indices locorum citatorum} with Bib\LaTeX, but this remains an
% intricate business and requires knowing how to redefine and/or patch
% standard and internal Bib\LaTeX\ commands.
%
% The \package{icite} package is but a modest piece of software which
% addresses this situation. It relies on citation commands, but does
% not require Bib\LaTeX. Instead, \hologo{BibTeX} can be used as
% \package{icite} uses the \package{usebib}
% package\footnote{\cite{usebib}} to build the indices by drawing
% directly from the bibliographical database.
%
%
% \section[The \package{icite} package]{The \textsf{icite} package}
% The \package{icite} package is loaded as usual like so:---
% \iffalse
%<*example>
% \fi
\begin{code}
  \usepackage[<options>]{icite}
\end{code}
% \iffalse
%</example>
% \fi
%
% \package{icite} may be loaded with three optional \enquote*{named
% arguments} either of which is set using the syntax
% \meta{key}$=$\meta{value}. The description of the optional arguments
% follows:---
%
% \DescribeOption{citecmd}\label{ref:citecmd}
% |citecmd|$=$\meta{command}\hfill\tcboxverb{Default: cite}\\
% \meta{command} may be any citation command accepted by
% \hologo{BibTeX} or Bib\LaTeX. This option is used by the \cs{icite}
% command that is described below. By default, \cs{icite} uses the
% \cs{cite} command to insert citations in the body text.
%
% \DescribeOption{defaultindex}
% |defaultindex|$=$|none|\verb+|+\meta{index\_name}\hfill%
% \tcboxverb{Default: not set}\\
% \meta{index\_name} is the name of the index in which all passages
% cited with the \cs{icite} command are to be found by default. As
% this option is not initially set, \cs{icite} naturally inserts cited
% passages in the default general index, unless |defaultindex| is set
% to the value |none|, in which case indexing is disabled. It must be
% noted that this named argument does not need a value as it defaults
% to |loccit| if it is used alone. This is an easy way to have all
% passages cited indexed in a separate index named |loccit|.
%
% \DescribeOption{nobibengine}\NEWfeature{v1.1}
% \changes{v1.1}{2019/03/12}{New global option \texttt{nobibengine}}%
% |nobibengine|$=$|true|\verb+|+|false|\hfill%
% \tcboxverb{Default: not set}\\
% This named argument does not need a value as it defaults to |true|
% if it is used. When this option is activated, \package{icite} does
% not use \hologo{BibTeX} or Bib\LaTeX\ to insert the citations in the
% body text---even if either is loaded in the preamble---and pulls the
% necessary information directly from the bibliographical
% database. For this reason, \cs{bibinput} described below is of
% course still required.  The citations inserted consist of the
% elements described below \vref{sec:entry-fields}
% \vpageref{sec:entry-fields}. However, it must be noted that if the
% entry field |shorthand| of any author/work be set in the database,
% it takes precedence over the fields used to define author names and
% titles.
%
% \paragraph{Bibliographical database}
% \DescribeMacro{\bibinput} Once \package{icite} is loaded, it must be
% connected to at least one bibliographic |.bib| file. To that end,
% \package{icite} uses the same \cs{bibinput} command as
% \package{usebib}.\footnote{Please refer to \cite[1]{usebib} for
% more detailed information on how to use this command.} An example
% follows:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % load icite, have \icite use \autocite by default, and insert cited
  % passages in a separate index named 'loccit':
  \usepackage[citecmd=autocite, defaultindex]{icite}
  % note that the .bib file must be stripped of its extension:
  \bibinput{bibliography} % that is: load bibliography.bib
\end{code}
% \iffalse
%</example>
% \fi
%
% \subsection{Preamble-only commands}
% The following commands may be found in the preamble only.
% \paragraph{Styling the titles}
% \DescribeMacro{\SetTitleStyle} By default, \package{icite} prints
% the titles of the works cited in italics.\\
% \cs{SetTitleStyle}\marg{formatting directives} can be used in the
% preamble only to customize the way titles are displayed in the
% indices, like so:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  \SetTitleStyle{\textbf{#1}}
\end{code}
% \iffalse
%</example>
% \fi
% As this example shows, |#1| is the token that is replaced with the
% actual title in the formatting directives of the \cs{SetTitleStyle}
% command.
% 
% \paragraph{Delimiters}
% \NEWfeature{v1.2}\DescribeMacro{\AuthorTitleDelim}
% \cs{AuthorTitleDelim}\marg{delimiter} sets the delimiter between
% authors and titles in the body text when the |nobibengine| option is
% set to |true|. The default delimiter is a comma and a space.
%
% \DescribeMacro{\TitlePageDelim}
% \cs{TitlePageDelim}\marg{delimiter} sets the delimiter between
% titles and pages in the body text when the |nobibengine| option is
% set to |true|. The default delimiter is a comma and a space.
%
% \subsection[\textsf{icite} for the Impatient]%
% {\package{icite} for the Impatient}
% Read \href{samples/icite-minimal.pdf}{\texttt{icite-minimal.pdf}}.
%
% \subsection{Entry fields}
% \label{sec:entry-fields}
% \subsubsection{Author names}
% To process author names, \package{icite} uses the following entry
% fields:
% \begin{description}
% \item[author] As for example in |author = {Ullmann, Manfred}|, which
% is satisfactory in most cases.
% \item[indexauthor] This field is not set by Bib\LaTeX. However, it
% may be used as a fallback field for multiple or complex names.
% \item[sortname] This standard Bib\LaTeX\ field which is never
%   printed may be used to modify the sorting order of the index
%   entries.
% \end{description}
%
% \paragraph{Example}
% From a given entry such as: \\[1ex]%
% |author = {|\prname{.hunayn ibn 'is.hAq al-`ibAdiyy, 'abU
% zayd}|}|\\[1ex]%
% it may prove useful to define an additional |indexauthor| field to
% have printed in the index only the relevant part of the name, like
% so: \\[1ex]%
% |indexauthor = {|\prname{.hunayn ibn 'is.hAq}|}| or
% |indexauthor = {|\prname{.hunayn}|}|\\[1ex]
% But in the end, the |sortname| field is also needed because the
% diacritics must be discarded so that the name be sorted
% properly:\\[1ex]%
% |sortname = {{|Hunayn ibn Ishaq|}}|
%
% \subsection{Titles}
% To process titles, \package{icite} uses the following entry fields:
% \begin{description}
% \item[title] The full title of the work.
% \item[shorttitle] The title in an abbriged form. If this entry is
% set, it takes precedence over the |title| field in the printed index.
% \item[indextitle] This field may be used to have a title such as
% \emph{The {\TeX}Book} printed in the index as \emph{{\TeX}Book, The}.
% \item[indexsorttitle] Like |sortname| for author names, this field is
% used for sorting only and is never printed. From the previous
% example, it may be used like so: \\%
% |indexsorttitle = {TEXBook}|
% \end{description}
% 
% \section{Basic use}
% \DescribeMacro{\icite} \package{icite} provides the \cs{icite}
% command which both inserts a formatted citation in the body text and
% an entry corresponding to the passage cited in the index. This
% command is to be used in place of any \hologo{BibTeX} or Bib\LaTeX\
% citation command the syntax of which is
% \cs{command}\oarg{pre}\oarg{post}\marg{key}. It must be noted that
% only standard citation commands are supported, with the exception of
% those mentioned as qualified citation lists or so-called
% \enquote*{multicite} commands. The full syntax of \cs{icite}
% follows:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  \icite[<pre>][<post>]{<key>}[<command>]
\end{code}
% \iffalse
%</example>
% \fi
% Where \oarg{command} can be used as a further optional argument to
% specify a standard citation command that \cs{icite} should emulate
% instead of the default \cs{cite} command or any other command set as
% default in the preamble by means of the |citecmd| global
% option.\footnote{See above, \vref{ref:citecmd}.}
%
% \paragraph{Example} The following example illustrates how
% \package{icite} can be used in combination with Bib\LaTeX\ and the
% \package{imakeidx} package to have the passages cited sorted and
% printed in a separate, specific \enquote*{Index of Passages
% Cited}:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % preamble
  % load icite, have \icite use \autocite by default, and insert cited
  % passages in a separate index named 'loccit':
  \usepackage[citecmd=autocite, defaultindex]{icite}
  % load bibliography.bib
  \bibinput{bibliography}

 % load biblatex (with oxnotes, \autocite acts as \footcite)
 \usepackage[style=oxnotes]{biblatex}
 \addbibresource{bibliography.bib} % mind the extension here

 % load imakeidx and use xindy to have the numbers sorted properly
 \usepackage[xindy]{imakeidx}
 \makeindex[name=loccit, title=Index of Passages Cited (modern authors)]
\end{code}
% \iffalse
%</example>
% \fi
%
% Then \cs{icite} can be used like so:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  \section*{\cs{icite} in action}
  Let us start with four citations of the same reference, to make sure
  that they are all indexed and sorted properly:
  one\icite[123]{Ullmann1970}, two\icite[231]{Ullmann1970},
  three\icite[81]{Ullmann1970} and four\icite[18]{Ullmann1970}.

  Let us continue with four other citations out of two other
  references: one\icite[90]{Bürgel2016}, two\icite[370]{Dols1987},
  three\icite[205]{Bürgel2016} and four\icite[380]{Dols1987}.

  Finally, let us have \cs{icite} use \cs{textcite} to cite
  \icite[123]{Endress1992}[textcite], and again, this time in a
  footnote\icite[86]{Endress1992}.
\end{code}
% \iffalse
%</example>
% \fi
% 
% \begin{tcblisting}{text only}
%   \section*{\cs{icite} in action}
%   Let us start with four citations of the same reference, to make
%   sure that they are all indexed and sorted properly:
%   one\icite[123]{Ullmann1970}, two\icite[231]{Ullmann1970},
%   three\icite[81]{Ullmann1970} and four\icite[18]{Ullmann1970}.
%
%   Let us continue with four other citations out of two other
%   references: one\icite[90]{Bürgel2016}, two\icite[370]{Dols1987},
%   three\icite[205]{Bürgel2016} and four\icite[380]{Dols1987}.
%
%   Finally, let us have \cs{icite} use \cs{textcite} to cite
%   \icite[123]{Endress1992}[textcite], and again, this time in a
%   footnote\icite[86]{Endress1992}.
% \end{tcblisting}
% 
% All indices and the contents of the \hologo{BibTeX} file that has
% been used can be found below in the appendix
% (\vrefrange{ref:indices}{ref:icite-bib} respectively). As can be
% seen by comparing the bibliography generated in the footnotes with
% the text printed in the index, \package{icite} prints as expected
% the abbridged forms of the titles when they are
% available. Furthermore, as a default citation command set in the
% preamble, the \enquote*{oxnotes} Bib\LaTeX\ option of
% \package{biblatex-oxref} style package makes \cs{autocite} behave
% like \cs{footcite}. Finally, the page numbers in the index are
% sorted properly: for example, two-digit numbers, like 81, are listed
% before 123.
%
% \section{Refined use}
% When references are made not only to modern authors but also to
% authors and works from classical antiquity or from the Middle Ages,
% it is commonly agreed that at least two separate indices of passages
% cited should be made. Another option is not to index passages cited
% from modern authors at all.
%
% \DescribeMacro{\IndexSubtypeAs} \package{icite} is able to
% differentiate between sources by drawing from the bibliographical
% database the exact string that may be found in the |entrysubtype|
% entry field. To that end, the \cs{IndexSubtypeAs} command is
% provided. It takes to mandatory arguments, like so:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  \IndexSubtypeAs{<subtype>}{<index_name>}
\end{code}
% \iffalse
%</example>
% \fi
% Where |<subtype>| is any given string used to specify an
% |entrysubtype| in the bibliographical database, and |<index_name>|
% the name of the index which the authors matching that subtype must
% go into. This command is to be found in the preamble only.
%
% Of course different subtypes can be associated with a single index
% or with different indices. That said, one should keep in mind that
% any entry the actual subtype of which is not associated with an
% index is processed as if it had no subtype at all. Examples
% follow:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % load icite, and have cited authors indexed in an index named
  % 'secondary':
  \usepackage[defaultindex=secondary]{icite}
  % except for authors whose 'entrysubtype' field matches the string
  % 'classical': have them indexed in an index named 'primary':
  \IndexSubtypeAs{classical}{primary}
  % authors whose 'entrysubtype' field matches the string 'medieval'
  % should go into the same index:
  \IndexSubtypeAs{medieval}{primary}
\end{code}
% \iffalse
%</example>
% \fi
% Or:
% \iffalse
%<*example>
% \fi
\begin{code}
  % load icite, but do not index passages cited with \icite:
  \usepackage[defaultindex=none]{icite}
  % except for authors whose 'entrysubtype' field matches the string
  % 'classical': have them indexed in an index named 'primary':
  \IndexSubtypeAs{classical}{primary}
  % authors whose 'entrysubtype' field matches the string 'medieval'
  % should go into the same index:
  \IndexSubtypeAs{medieval}{primary}
\end{code}
% \iffalse
%</example>
% \fi
%
% \paragraph{Example} In the following example, modern authors, namely
% those whose |entrysubtype| field does not match the string
% |classical| should go into the default |loccit| index. As for those
% whose |entrysubtype| matches |classical|, they should to into an
% index named |primary|. \label{ref:classics-pkg}Furthermore, the
% \package{classics} package is used to format references in which a
% volume number is used.\footnote{For more information, see below
% \vref{sec:classics-usage}.} In this way, \package{xindy} only has
% numbers to handle:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % preamble
  \usepackage[style=oxnotes]{biblatex}
  \addbibresource{bibliography.bib}

  \usepackage[xindy]{imakeidx}
  \makeindex[name=loccit, title=Index of passages cited (modern authors)]
  \makeindex[name=primary, title=\emph{Index locorum citatorum}]

  \usepackage{classics}
  \newclassic{iau}{\classicsRoman{#1}|, #1|.#1}
  \newclassic{razi}{#1|.#1}
  \newclassic{nadim}{\classicsRoman{#1}|.#1|, #1}
  
  \usepackage[citecmd=autocite,defaultindex]{icite}
  \IndexSubtypeAs{classical}{primary}
\end{code}
% \iffalse
%</example>
% \fi
% 
% Then \cs{icite} can be used like so:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  \section*{\cs{icite} in action}
  Let us start with four citations of the same reference, to make sure
  that they are all indexed and sorted properly:
  one\icite[123]{Ullmann1970}, two\icite[231]{Ullmann1970},
  three\icite[81]{Ullmann1970} and four\icite[18]{Ullmann1970}.

  Let us continue with four other citations out of two other
  references: one\icite[90]{Bürgel2016}, two\icite[370]{Dols1987},
  three\icite[205]{Bürgel2016} and four\icite[380]{Dols1987}.

  Before concluding, let us insert a few references to medieval Arabic
  authors: one\icite[\iau{1}[81][32]]{IAUMuller},
  two\icite[\razi{5}[7--10]]{RaziShukuk}, three\icite[133]{al-Qifti},
  four\icite[\nadim{3}[7][286]]{al-Nadim},
  five\icite[\iau{2}[214][20]]{IAUMuller},
  six\icite[\razi{1}[6--20]]{RaziShukuk},
  seven\icite[126.15--20]{al-Qifti} and
  eight\icite[\nadim{3}[7][291]]{al-Nadim}.

  Finally, let us have \cs{icite} use \cs{textcite} to cite
  \icite[123]{Endress1992}[textcite], and again, this time in a
  footnote\icite[86]{Endress1992}.
\end{code}
% \iffalse
%</example>
% \fi
%
% \begin{tcblisting}{text only}
%   \section*{\cs{icite} in action}
%   Let us start with four citations of the same reference, to make
%   sure that they are all indexed and sorted properly:
%   one\icite[123]{Ullmann1970}, two\icite[231]{Ullmann1970},
%   three\icite[81]{Ullmann1970} and four\icite[18]{Ullmann1970}.
%
%   Let us continue with four other citations out of two other
%   references: one\icite[90]{Bürgel2016}, two\icite[370]{Dols1987},
%   three\icite[205]{Bürgel2016} and four\icite[380]{Dols1987}.
%
%   Before concluding, let us insert a few references to medieval
%   Arabic authors: one\icite[\iau{1}[81][32]]{IAUMuller},
%   two\icite[\razi{5}[7--10]]{RaziShukuk},
%   three\icite[133]{al-Qifti},
%   four\icite[\nadim{3}[7][286]]{al-Nadim},
%   five\icite[\iau{2}[214][20]]{IAUMuller},
%   six\icite[\razi{1}[6--20]]{RaziShukuk},
%   seven\icite[126.15--20]{al-Qifti} and
%   eight\icite[\nadim{3}[7][291]]{al-Nadim}.
%
%   Finally, let us have \cs{icite} use \cs{textcite} to cite
%   \icite[123]{Endress1992}[textcite], and again, this time in a
%   footnote\icite[86]{Endress1992}.
% \end{tcblisting}
%
% As already said above, all indices and the contents of the
% \hologo{BibTeX} file that has been used can be found below in the
% appendix (\vrefrange{ref:indices}{ref:icite-bib} respectively). As
% one can see, \prname{al-rAziyy} has been sorted under the letter R
% and references to classical works have been formatted properly.
%
%
% \subsection[The \textsf{classics} package]%
% {The \package{classics} package} %
% \label{sec:classics-usage}
% As said above \vpageref{ref:classics-pkg}, it is advisable to use
% the \package{classics} package to format volume, page, column, line
% numbers and the like which are inserted in the \meta{post} optional
% argument of the \cs{icite} command\autocite{classics}. An example of
% using \package{classics} to format references to Aristotle according
% to Bekker pagination follows:\footnote{See \cite[2]{classics} for
% more information.}--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % preamble:
  \usepackage{classics}
  \newclassic{aristotle}{#1|\textit{#1}|#1}
\end{code}
% \iffalse
%</example>
% \fi
% \iffalse
%<*example>
% \fi
\begin{example}
  In \emph{Politics}, Aristotle says that man is by nature a political
  animal in the following passages: \aristotle{1253}[a][2--9] (Book~1)
  and again in \aristotle{1278}[b][19] (Book~3). The latter passage
  shows that one should read the whole section of Book~1 concerning
  household management and the control of slaves
  (\aristotle*{1253}[b][1]{1253}[b][39]).
\end{example}
% \iffalse
%</example>
% \fi
% The following prints the same body text while using \package{icite}
% to have the passages cited inserted in the \emph{Index locorum
% citatorum} (see below \vref{sec:index-loc-cit}):--- %
% \iffalse
%<*example>
% \fi
\begin{example}
  In \emph{Politics}, Aristotle says that man is by nature a political
  animal in the following passages:
  \icite[\aristotle{1253}[a][2--9]]{Aristotle:Politica}[notecite]
  (Book~1) and again in \icite[\aristotle{1278}[b][19]]%
  {Aristotle:Politica}[notecite] (Book~3). The latter passage shows
  that one should read the whole section of Book~1 concerning
  household management and the control of slaves
  \icite[\aristotle*{1253}[b][1]{1253}[b][39]]%
  {Aristotle:Politica}[pnotecite].
\end{example}
% \iffalse
%</example>
% \fi
% As can be seen, the \cs{notecite} and \cs{pnotecite} commands have
% been used to insert only the references in the body text.
%
% It is also advisable to use \package{xindy} to compile indices of
% passages cited because \package{xindy}, unlike \package{makeindex}
% or \package{xindex}, is able to sort numbers properly: for example,
% with \package{xindy}, such a number as 81 will come before 100, but
% will be sorted after 100 with the other two engines.
% \begin{tcblisting}{text only, title=Caveat}
%   \package{xindy} (actually |texindy|) is also designed to ignore
%   \TeX\ commands by default. However, due to a missing line in
%   |xindy/modules/base/tex.xdy|,\footnote{As the time of writing, in
%   \package{xindy} v2.5.1.} this does not apply to so-called
%   \enquote*{starred} \TeX\ commands, such as \cs{aristotle*} from
%   the example above.
% \end{tcblisting}
% One easy way to get around this issue is to create a style file with
% a single line that instructs \package{xindy} to ignore the asterisk
% when processing the index, like so:--- %
% \iffalse
%<*example>
% \fi
\begin{tcblisting}{minted language=lisp, listing only, title=icite.xdy}
  (merge-rule "\*" "" :eregexp)
\end{tcblisting}
% \iffalse
%</example>
% \fi
% 
% The following example shows how this simple rule can be
% applied:--- %
% \iffalse
%<*example>
% \fi
\begin{code}
  % preamble:
  \usepackage[xindy]{imakeidx}
  \makeindex[name=loccit, options=-M icite.xdy]
  % document:
  \printindex[loccit]
\end{code}
% \iffalse
%</example>
% \fi
% Of course, the document itself must be compiled with
% |--shell-escape|.\footnote{See \cite[2--4]{imakeidx}.}
%
% \section{Appendix}
% Designing the layout of indices is out of the scope of this
% documentation. For information, the \package{tabto} package has been
% used in the preamble in combination with the following |xindy| style
% file:--- %
% \iffalse
%<*example>
% \fi
\begin{tcblisting}{minted language=lisp, listing only,
    title=icite.xdy}
(markup-locclass-list :open "\tabto{3.5cm}" :sep ", ")
\end{tcblisting}
% \iffalse
%</example>
% \fi
%
% \subsection{Indices}
% \label{ref:indices}
% \subsubsection{Index of Passages Cited (modern authors)}
% \printindex[loccit]
% \needspace{8\baselineskip}
% \subsubsection{\emph{Index locorum citatorum}}
% \label{sec:index-loc-cit}
% \printindex[primary]
% 
% \subsection{\texorpdfstring{\hologo{BibTeX}
% file used in this document}{BibTeX file used in this document}}
% \label{ref:icite-bib}
% \tcbinputlisting{minted options={linenos, numbersep=1.5mm}, minted
% language=bibtex, listing file=icite.bib, listing only}
%
%\StopEventually{}
%
% \section{Implementation}
%
% \iffalse
%<*package>
% \fi
% Declare the global options, and define them:
%    \begin{macrocode}
\RequirePackage{xkeyval}
\DeclareOptionX{citecmd}[cite]{\def\ic@dfltcit{#1}}
\newif\ifdefault@index
\newif\ifno@index
\DeclareOptionX{defaultindex}[loccit]{
  \edef\@tempa{#1}
  \edef\@none{none}
  \ifx\@tempa\@none
  \no@indextrue
  \else
  \default@indextrue
  \def\ic@dfltind{#1}
  \fi
}
\newif\ifno@bibengine
\define@boolkey{icite.sty}[@pkg@]{nobibengine}[true]{%
  \if@pkg@nobibengine\no@bibenginetrue\else\fi}
\ExecuteOptionsX{citecmd}
\ProcessOptionsX\relax
%    \end{macrocode}
% The following packages are required by \package{icite}:
%    \begin{macrocode}
\RequirePackage{xparse}
\RequirePackage{datatool}
\RequirePackage{usebib}
%    \end{macrocode}
% If |nobibengine| is set to true, then \cs{ic@dfltcit} will be
% redefined by \cs{icite} to \cs{ic@nullcmd} which does nothing.
%    \begin{macrocode}
\NewDocumentCommand{\ic@nullcmd}{O{}O{}m}{}
%    \end{macrocode}
% Define fields to be used by \package{icite}:
%    \begin{macrocode}
\define@reuse@key{author}
\define@reuse@key{indexauthor}
\define@reuse@key{sortname}
\define@reuse@key{title}
\define@reuse@key{shorttitle}
\define@reuse@key{indextitle}
\define@reuse@key{indexsorttitle}
\define@reuse@key{entrysubtype}
\define@reuse@key{shorthand}
%    \end{macrocode}
% This is the same as \cs{usebibentry} from \package{ebib}, but it
% does not return an error if the entry field is not found:
%    \begin{macrocode}
\def\get@bibentry#1#2{\@ifundefined{reuse@#1@#2}{}
  {\@nameuse{reuse@#1@#2}}}
%    \end{macrocode}
% Create a new database which \package{icite} will use to connect
% Bib\LaTeX\ \enquote*{subtypes} to indices.
%    \begin{macrocode}
\DTLnewdb{icite@indices}
%    \end{macrocode}
% \DescribeMacro{\IndexSubtypeAs} \cs{IndexSubtypeAs} takes two
% mandatory arguments: 1. Any given keyword used to specify an
% \enquote*{entrysubtype} in the bibliographical database and 2. The
% index which the authors matching that subtype must go into. This
% command is to be found in the preamble only.
%    \begin{macrocode}
\NewDocumentCommand{\IndexSubtypeAs}{m m}{%
  \DTLnewrow{icite@indices}
  \DTLnewdbentry{icite@indices}{subtype}{#1}
  \DTLnewdbentry{icite@indices}{index}{#2}
}
\@onlypreamble\IndexSubtypeAs
%    \end{macrocode}
% \DescribeMacro{\SetTitleStyle} By default, titles are printed in
% italics. This can be changed in the preamble by \cs{SetTitleStyle}.
%    \begin{macrocode}
\NewDocumentCommand{\TitleStyle}{m}{\emph{#1}}
\NewDocumentCommand{\SetTitleStyle}{m}{%
  \RenewDocumentCommand{\TitleStyle}{m}{#1}
}
\@onlypreamble\SetTitleStyle
%    \end{macrocode}
% \DescribeMacro{\AuthorTitleDelim}
% \changes{v1.2}{2019/03/17}{\cs{AuthorTitleDelim}: delimiter
% between authors and titles}\cs{AuthorTitleDelim}\marg{delimiter}
% sets the delimiter between authors and titles in the body text when
% the |nobibengine| option is set to |true|. The default delimiter is
% a comma.
%    \begin{macrocode}
\def\ic@authtitdelim{, }
\NewDocumentCommand{\AuthorTitleDelim}{m}{%
  \def\ic@authtitdelim{#1}
}
\@onlypreamble\AuthorTitleDelim
%    \end{macrocode}
% \DescribeMacro{\TitlePageDelim}
% \changes{v1.2}{2019/03/17}{\cs{TitlePageDelim}: the delimiter
% between titles and pages}\cs{TitlePageDelim}\marg{delimiter} sets
% the delimiter between titles and pages in the body text when the
% |nobibengine| option is set to |true|. The default delimiter is a
% comma.
%    \begin{macrocode}
\def\ic@titpgdelim{, }
\NewDocumentCommand{\TitlePageDelim}{m}{%
  \def\ic@titpgdelim{#1}
}
\@onlypreamble\TitlePageDelim
%    \end{macrocode} 
% \DescribeMacro{\icite} \cs{icite} both inserts a formatted citation
% and an entry in the \emph{index locorum citatorum}. It is to be used
% in place of any \hologo{BibTeX} or Bib\LaTeX\ citation command the
% syntax of which is
% \cs{command}\oarg{pre}\oarg{post}\marg{key}. \cs{icite} further
% accepts an optional argument should one wish to specify the
% citation command to be used, like so:\\
% \cs{icite}\oarg{pre}\oarg{post}\marg{key}\oarg{command}\\
% Only standard citation commands are accepted, with the exception of
% qualified citation lists or so-called \enquote*{multicite} commands.
%    \begin{macrocode}
\NewDocumentCommand{\icite}{o o m O{\ic@dfltcit}}{%
  \edef\ic@argiv{#4}%
  \edef\ic@null{ic@nullcmd}%
  \ifno@bibengine\let\ic@argiv\ic@null\else\fi%
  \edef\@shorthand{\get@bibentry{#3}{shorthand}}%
  \edef\@subtype{\get@bibentry{#3}{entrysubtype}}%
  \edef\@author{\get@bibentry{#3}{author}}%
  \edef\@indexauthor{\get@bibentry{#3}{indexauthor}}%
  \edef\@sortname{\get@bibentry{#3}{sortname}}%
  \edef\@indexsorttitle{\get@bibentry{#3}{indexsorttitle}}%
  \edef\@indextitle{\get@bibentry{#3}{indextitle}}%
  \edef\@shorttitle{\get@bibentry{#3}{shorttitle}}%
  \edef\@title{\get@bibentry{#3}{title}}%
  \ifx\@indexauthor\empty
      \def\@useauthor{\@author}%
    \else
      \def\@useauthor{\@indexauthor}%
    \fi
  \ifx\@sortname\empty
      \def\@sortedauthor{\@useauthor}%
    \else
      \def\@sortedauthor{{\@sortname}@\@useauthor}%
    \fi
  \ifx\@indextitle\empty
    \ifx\@shorttitle\empty
      \def\@usetitle{\@title}%
    \else
      \def\@usetitle{\@shorttitle}%
    \fi
  \else
    \def\@usetitle{\@indextitle}%
  \fi
  \ifx\@indexsorttitle\empty
    \def\@sortedtitle{{\@usetitle}@\TitleStyle{\@usetitle}}%
  \else
    \def\@sortedtitle{{\@indexsorttitle}@\TitleStyle{\@usetitle}}%
  \fi
  \IfNoValueTF{#1}%
  {\DTLifdbempty{icite@indices}{%
      \ifno@index\else
      \ifdefault@index%
      \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle}%
      \else%
      \index{\@sortedauthor!\@sortedtitle}%
      \fi\fi%
    }{%
      \DTLforeach*{icite@indices}{%
        \icite@subtype=subtype,\icite@index=index}{%
        \ifx\@subtype\icite@subtype%
        \index[\icite@index]{\@sortedauthor!\@sortedtitle}%
        \dtlbreak%
        \else%
        \ifno@index\else
        \ifdefault@index%
        \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle}%
        \else%
        \index{\@sortedauthor!\@sortedtitle}%
        \fi\fi%
        \fi}}
    \ifno@bibengine
    \ifx\@shorthand\empty%
    \@useauthor\ic@authtitdelim\TitleStyle{\@usetitle}%
    \else%
    \@shorthand%
    \fi%
    \else%
    \fi%
    \csname\ic@argiv\endcsname{#3}%
  }
  {\IfNoValueTF{#2}%
    {\DTLifdbempty{icite@indices}{%
        \ifno@index\else
        \ifdefault@index%
        \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle!#1}%
        \else%
        \index{\@sortedauthor!\@sortedtitle!#1}%
        \fi\fi%
      }{%
        \DTLforeach*{icite@indices}{%
          \icite@subtype=subtype,\icite@index=index}{%
          \ifx\@subtype\icite@subtype%
          \index[\icite@index]{\@sortedauthor!\@sortedtitle!#1}%
          \dtlbreak%
          \else%
          \ifno@index\else
          \ifdefault@index%
          \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle!#1}%
          \else%
          \index{\@sortedauthor!\@sortedtitle!#1}%
          \fi\fi%
          \fi}}%
      \ifno@bibengine
      \ifx\@shorthand\empty%
      \@useauthor\ic@authtitdelim\TitleStyle{\@usetitle}%
         \ic@titpgdelim{#1}%
      \else%
      \@shorthand\ic@titpgdelim{#1}%
      \fi%
      \else%
      \fi%
      \csname\ic@argiv\endcsname[{#1}]{#3}%
    }
    {\DTLifdbempty{icite@indices}{%
        \ifno@index\else
        \ifdefault@index%
        \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle!#2}%
        \else%
        \index{\@sortedauthor!\@sortedtitle!#2}%
        \fi\fi%
      }{%
        \DTLforeach*{icite@indices}{%
          \icite@subtype=subtype,\icite@index=index}{%
          \ifx\@subtype\icite@subtype%
          \index[\icite@index]{\@sortedauthor!\@sortedtitle!#2}%
          \dtlbreak%
          \else%
          \ifno@index\else
          \ifdefault@index%
          \index[\ic@dfltind]{\@sortedauthor!\@sortedtitle!#2}%
          \else%
          \index{\@sortedauthor!\@sortedtitle!#2}%
          \fi\fi%
          \fi}}%
      \ifno@bibengine
      \ifx\@shorthand\empty%
      #1 \@useauthor\ic@authtitdelim\TitleStyle{\@usetitle}%
         \ic@titpgdelim{#2}%
      \else%
      #1 \@shorthand\ic@titpgdelim{#2}%
      \fi
      \else%
      \fi%
      \csname\ic@argiv\endcsname[#1][{#2}]{#3}%
    }%
  }%
}
%    \end{macrocode}
% \iffalse
%</package>
% \fi
%\Finale
\endinput