Expression that represents an alphabet of a regular language.
Since this package is about a regular expression over element declarations,
this represents an XML element declaration (hence the name.)
Element needs to be interned, meaning one
Element per one tag name.
Implements
ElementSet to represent a self.
author: Kohsuke Kawaguchi
Previous element in the DFS post-order traveral
of the element graph.
We use
prevPostOrder==null as a check if the element is visted in DFS,
so this chain terminates by a self-reference, not by having null.
Set in
Element.assignDfsPostOrder(Element)
Checks if the given
ConnectedComponent forms a cut-set
of a graph.
Parameters: visited - Used to keep track of visited nodes.true if it is indeed a cut-set. false if not.