string allowing escape sequences which are replaced according
to the context.
For node attributes, the substring
\N is replaced by the name of the node,
and the substring
\G by the name of the graph.
For graph or cluster attributes, the substring
\G is replaced by the
name of the graph or cluster.
For edge attributes, the substring
\E is replaced by the name of the edge,
\G is replaced by the name of the graph or cluster,
and the substrings
\H by the names of
the tail and head nodes, respectively.
The name of an edge is the string formed from the name of the
tail node, the appropriate edge operator (
->) and the name of the
In all cases, the substring
\L is replaced by the object's label attribute.
Obviously, one can use
\\ to get a single backslash. A backslash appearing before any
character not listed above is ignored.
escString is a valid type for: