java.lang.Object
tools.refinery.interpreter.matchers.planning.operations.POperation
tools.refinery.interpreter.matchers.planning.operations.PStart

public class PStart extends POperation
No constraints, and no parent SubPlan, just a (possibly empty) set of a priori known (input) variables. Satisfied by a single tuple.

Can also be used without a priori variables, e.g. as a "virtual parent" in extreme cases, such as pattern foo(Bar) = {Bar = eval (3*4)}