Compiling tikzmanual example with chains and branches

Question

Does someone know how I must compile the example of the tikz/pgf user manual (v2.10) in section 28.5:

\usetikzlibrary{chains}

\begin{tikzpicture}[every on chain/.style=join,every join/.style=->,
node distance=2mm and 1cm]
{ [start chain=trunk]
\node [on chain] {A};
\node [on chain] {B};
{ [start branch=numbers going below]
\node [on chain] {1};
\node [on chain] {2};
\node [on chain] {3};
}
{ [start branch=greek going above]
\node [on chain] {$\alpha$};
\node [on chain] {$\beta$};
\node [on chain] {$\gamma$};
}
\node [on chain,join=with trunk/numbers-end,join=with trunk/greek-end] {C};
{ [start branch=symbols going below]
\node [on chain] {$\star$};
\node [on chain] {$\circ$};
\node [on chain] {$\int$};
}
}
\end{tikzpicture}

Like this I get

Line 6: Package tikz Error: Unknown chain ``chain''.

Answer 1

Load the scopes library:

\usetikzlibrary{chains,scopes}

The complete example:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{chains,scopes}

\begin{document}

\begin{tikzpicture}[every on chain/.style=join,every join/.style=->,
node distance=2mm and 1cm]
{ [start chain=trunk]
\node [on chain] {A};
\node [on chain] {B};
{ [start branch=numbers going below]
\node [on chain] {1};
\node [on chain] {2};
\node [on chain] {3};
}
{ [start branch=greek going above]
\node [on chain] {$\alpha$};
\node [on chain] {$\beta$};
\node [on chain] {$\gamma$};
}
\node [on chain,join=with trunk/numbers-end,join=with trunk/greek-end] {C};
{ [start branch=symbols going below]
\node [on chain] {$\star$};
\node [on chain] {$\circ$};
\node [on chain] {$\int$};
}
}
\end{tikzpicture}

\end{document}

The presence of an opening brace followed by some options (inside square brackets) usually indicates the syntax for a scope provided by the scopes library.