Embedding Pubmed, Graphviz and a remote image in #LaTeX

Embedding Pubmed, Graphviz and a remote image in #LaTeX by Pierre Lindenbaum.

Pierre demonstrates how to use:

\newcommand{name}[num]{definition}

to load a remote picture, a graphviz result and retrieving a PubMed record for embedding in a LaTeX document.

From the LaTeX Macro page Pierre cites:

The num argument in square brackets is optional and specifies the number of arguments the new command takes (up to 9 are possible). If missing it defaults to 0, i.e. no argument allowed.

I caught myself wondering about that argument.

The graphviz command looks particularly interesting for topic map illustrations.

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