An error caused by attempting to fulfil a dependency that was circular
@note This exception will be thrown iff a {Vertex} is added to a
{DependencyGraph} that has a {DependencyGraph::Vertex#path_to?} an existing {DependencyGraph::Vertex}
A state that encapsulates a single possibility to fulfill the given {#requirement}
Contains or links to the content of the Entry
. It has the following attributes:
type
src
Reference: validator.w3.org/feed/docs/rfc4287.html#element.content
TextConstruct
that describes a summary of the Entry
.
Reference: validator.w3.org/feed/docs/rfc4287.html#element.summary