fig-ext-ids.texfig

%\documentclass{article}
\documentclass[a5paper,landscape]{article}
\usepackage{listings}
\lstloadlanguages{XML}
\lstset{flexiblecolumns=true,tagstyle=\ttfamily, showstringspaces=False}
\usepackage{tikz}
\usepackage[pass]{geometry}


\newcommand\tikzmark[1]{%
  \tikz[remember picture,overlay]\node (#1){};}

\begin{document}
\pagestyle{empty}
\newgeometry{margin=0pt}

\hbox{%
%\begin{lstlisting}[language=XML,basicstyle=\fontsize{8pt}{10pt},
\begin{lstlisting}[language=XML, basicstyle=\ttfamily\large,
	escapechar=^]
<ri:Resource xsi:type="vs:CatalogService">
  <title>Example Data For Identifiers in VOResource</title>
  <identifier>ivo://org.gavo.dc/hsoy/q/q^\tikzmark{ivoid}^</identifier>
  <altIdentifier>doi:10.555/fictional-resource^\tikzmark{recdoi}^</altIdentifier>
  <curation>
    <publisher>E.X Ample Data Providers</publisher>
    <creator altIdentifier="https://orcid.org/^\tikzmark{orcid}^0000-0001-2345-6789">
      <name>Uthor, A.</name>
     </creator>
    <contact>...</contact>
  </curation>
  <content>
    ...
    <source format="bibcode">2018ivoa^\tikzmark{bibcode}^.spec.0625P</source>
    <relationship>
      <relationshipType>IsDerivedFrom</relationshipType>
      <relatedResource altIdentifier="doi:10.555/^\tikzmark{reldoi}^fictional-data"
        >Generic non-VO data</relatedResource>
    </relationship>
  </content>
</ri:Resource>
\end{lstlisting}%
\hfil
\begin{tikzpicture}[remember picture,overlay,
expbox/.style={rectangle,rounded corners=2mm,
	top color=blue!20,bottom color=blue!20,text width=3cm},
exparrow/.style={line width=1mm,opacity=0.5,color=blue!40}
]
\node[expbox] at (0, 3) (ivoid-exp){The VO-internal IVOID};
\draw [exparrow] (ivoid-exp) to (ivoid);
\node[expbox] at (0, 0.8) (recdoi-exp){A DOI describing the full record};
\draw [exparrow] (recdoi-exp) to (recdoi.south);
\node[expbox] at (-5.5, 0.4) (orcid-exp){An ORCID for an author};
\draw [exparrow] (orcid-exp) to (orcid.south);
\node[expbox] at (-2, -0.3) (bibcode-exp){A Bibcode to cite};
\draw [exparrow] (bibcode-exp) to (bibcode.north);
\node[expbox] at (-2, -3) (reldoi-exp){A DOI for VO-external data};
\draw [exparrow] (reldoi-exp) to (reldoi.south);
\end{tikzpicture}%
}
\end{document}