Nodes can be selected based on their node type and the arc type, direction, and number of arcs incident to them.
To select nodes by matching on their incident arc structure in the active window:
A Select by Structure dialog appears.
The any choice in the popup menu matches any node type.
The any choice in the popup menu matches any arc type.
Since composite arcs may contain (elided) non-composite arcs of the specified arc type, the search may pass through these composite arcs to select the matching nodes. The composite arc type choice matches only composite arcs.
Note: The arc type set must be non-empty.
The in choice specifies incoming, the out choice specifies outgoing, and the any choice specifies any direction.
The five comparison operators are: lt (less than), le (less than or equal), eq (equal), ge (greater than or equal), and gt (greater than).
Nodes with the specified node types are selected if the count of the incident arcs of the specified arc type and direction match according to the comparison operator.
A series of searches is possible; if you hold down the shift key while clicking Select, the matching nodes are added to the current selection (rather than replacing it).