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+% Copyright (c) 2018 Robert White
+
+% 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 <https://www.gnu.org/licenses/>.
+
+\ProvidesPackage{identkey}[2018/10/29 v0.1.0 Package for typesetting bracketed dichotomous identification keys]
+
+\RequirePackage{enumitem}
+\RequirePackage{etoolbox}
+
+\setlist[1]{labelindent=\parindent}
+\newlist{key}{enumerate}{1}
+\setlist[key]{leftmargin=*, label=\arabic*, labelsep=10pt, format=\bfseries}
+
+\newcounter{coupletcounter}
+\setcounter{coupletcounter}{0}
+
+\newcommand\lead{%
+ \refstepcounter{coupletcounter}%
+ \ifnumodd{\value{coupletcounter}}{\firstlead}{\secondlead}%
+}
+
+\newcommand\firstlead{\item}
+\newcommand\secondlead{%
+ \item[\@itemlabel\rlap{:}]%
+}
+
+\newcommand{\ident}[1]{ \dotfill\textit{\textbf{#1}}}
+\newcommand{\goto}[1]{ \dotfill\textbf{#1}}
+
+\endinput