using the dot format with isaviz

Hi,
As part of a software engineering project at LLNL and UiO we are
automatically generating a graph of the runtime heap of a program or the
AST of a program in the graphviz dot format. These graphs can become very
large as it is a representation of a program and even though we are able
to view it using a tool developed internally, it is not easy to navigate
in them. Your tool seems to do what we want so we would rather focus on it
instead of our internal tool if it is possible, and therefore my question
is if there is any way that a dot graph like the one attached can be
displayed in IsaViz. Is there a tool to easily convert from a graphviz dot
file into an RDF file? Is there any other way of viewing graphviz dot
files in IsaViz? Of cause we could change our format from dot to RDF, but
for now that it not an option for various reasons so I hope that you can
help me.

Thanks :)
Andreas Saebjoernsen
University of Oslo