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+graphviz
+========
+
+.. digraph:: foo
+   :caption: caption of graph
+
+   bar -> baz
+
+.. |graph| digraph:: bar
+
+           bar -> baz
+
+Hello |graph| graphviz world
+
+.. digraph:: foo
+   :graphviz_dot: neato
+   :class: neato_graph
+
+   baz -> qux
+
+
+.. graphviz:: graph.dot
+
+.. digraph:: bar
+   :align: right
+   :caption: on *right*
+
+   foo -> bar
+
+.. digraph:: foo
+   :align: center
+
+   centered
+
+.. graphviz::
+   :align: center
+
+   digraph test {
+     foo [label="foo", URL="#graphviz", target="_parent"]
+     bar [label="bar", image="./_static/images/test.svg"]
+     baz [label="baz", URL="./_static/images/test.svg"]
+     foo -> bar -> baz
+   }