me to specify all of the property maps,
BGL provides defaults that assume some of the properties are interior
and can be accessed via <TT>get(Property, g)</TT> from the graph, or
if the property map is only used internally, then the algorithm will
create a property map for itself out of an array and using the graph's
vertex index map as the offset into the array. Below we show a call to
<TT>dijkstra_shortest_paths</TT> algorithm using all defaults for the
named parameters. This call is equivalent to the pre