# Module type Fixpoint.Analysis

    module type Analysis = sig .. end

    type data

information stored at each vertex

    type edge

type of edges of the underlying graph

    type vertex

type of vertices of the underlying graph

    type g

type of the underlying graph

    val direction : Fixpoint.direction

the direction of the analysis

    val join : data -> data -> data

operation how to join data when paths meet

    val equal : data -> data -> bool

predicate to determine the fixpoint

    val analyze : edge -> data -> data

the actual analysis of one edge; provided the edge and the incoming data, it needs to compute the outgoing data