incident

A link-node connection. A link is incident to a node if the node is at one end of the link. A node is incident to a link if that link is incident to the node.

incoming link

A directed link that ends at the node.

incremental layout

A layout process where the result of a previous layout is used as the starting point for applying the layout algorithm a second time to a modified graph in order to minimize the changes.

intercluster link

A link that has its end nodes in different clusters.

intergraph link

In a nested graph, a link whose end nodes are contained in different subgraphs.

intracluster link

A link that has its end nodes in the same cluster.