using and re-using metadata in LaTeX

pour mieux référencer votre papier, introduisez des metas en ajoutant avant le ``begin{document} `` la commande

\hypersetup{%
  pdftitle={my title},%
  pdfsubject={short description},%
  pdfauthor={Laurent Perrinet <Laurent.Perrinet@univ-amu.fr.fr>, INT/CNRS, 31, ch. Joseph Aiguier, 13402 Marseille Cedex 20, France; https://laurentperrinet.github.io},%
  pdfkeywords={Neuronal representation, ....},%
}

vous aurez besoin auparavant de charger le package hyperref:

\usepackage[pdftex, pdfusetitle ,colorlinks=false, pdfborder={0 0 0}]{hyperref}%

the basics is to use variables within LaTex

for instance, these may be useful to define a switch

\let \mode=0
\if 1\mode
 truc...truc...truc
\else
\fi

even better, we can use string variables

\documentclass[11pt]{article}
%-------definitions-----
\newcommand{\Author}{Laurent Perrinet}
\newcommand{\Address}{INT}
\newcommand{\Website}{https://laurentperrinet.github.io}
\newcommand{\Email}{Laurent.Perrinet@incm.cnrs-mrs.fr}
\newcommand{\Title}{My title}
\newcommand{\Keywords}{my first keyword, my first keyword, more keywords.}
%--------------------------
\usepackage{url}
\usepackage[pdftex, pdfusetitle,colorlinks=false,pdfborder={0 0 0}]{hyperref}%
\hypersetup{%
pdftitle={\Title},%
pdfauthor={\Author < \Email > \Address - \Website},%
pdfkeywords={\Keywords},%
}%
\begin{document}
\title{\Title}
\author{\Author\thanks{\Address , e-mail: \Email , WWW: \Website }}
\date{}
\maketitle
{\bf Keywords:} \Keywords %

My text is here...

\end{document}