[R] Rgraphviz: how to read a "dot" file?

[Sam Steingold]

The Rgraphviz package index says nothing about reading "dot" files.
(it has "toFile" to write them but no fromFile).
How do I create an Ragraph object?
(either by reading a dot file or from a list of edges with weights and
vertices with names and other attributes).
-- 
Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000
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Is there another word for synonym?