REGULAR EXPRESSION PATTERN MATCHING USING KEYWORD GRAPHS

摘要

Expanding a regular expression set into an expanded expression set that recognizes a same language as the regular expression set and includes more expressions than the regular expression set, with less operators per expression includes: logically connecting the expressions in the regular expression set; parsing the expanded expression set; transforming the parsed expanded expression set into a Glushkov automata; transforming the Glushkov automata into a modified deterministic finite automaton in order to maintain fundamental graph properties; combining the modified DFA into a keyword graph using a combining algorithm that preserves the fundamental graph properties; and computing an Aho-Corasick fail function for the keyword graph using a modified algorithm to produce a modified Aho-Corasick graph with a goto and a fail function and added information per state.