4 Finite automata –DFA The primary objective of this module is to define patterns using Deterministic Finite Automata (DFA) and Non-deterministic Finite automata (NFA). As a first step, this module also discusses the procedure to convert a regular expression to ε-NFA. 4.1 Transition Diagram A transition diagram is a stylized flowchart or a directed graph that depicts the actions that take place when a lexical analyser is called by the parser to get the next token. It has been already ... In terms of manufacturing design processes, there are three main types, DfM, DfA, and DfMA. PCI explains what they entail. Read on to find out more. Let's keep it that way. DFA is the official website of the Philippine Department of Foreign Affairs. It provides information and services for passport application, authentication, consular assistance and more.