SYNTAX ANALYSIS
ROLE OF THE PARSER
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Detailed explanation-1: -A directed acyclic graph (DAG) is a conceptual representation of a series of activities. The order of the activities is depicted by a graph, which is visually presented as a set of circles, each one representing an activity, some of which are connected by lines, which represent the flow from one activity to another.
Detailed explanation-2: -A directed acyclic graph (or DAG) is a digraph that has no cycles. Example of a DAG: Theorem Every finite DAG has at least one source, and at least one sink. In fact, given any vertex v, there is a path from some source to v, and a path from v to some sink.
Detailed explanation-3: -A directed acyclic graph may be used to represent a network of processing elements. In this representation, data enters a processing element through its incoming edges and leaves the element through its outgoing edges.