Indexed grammar
generalization of context-free grammars in that nonterminals are equipped with lists of flags, or index symbols
en-GB/ˈɪndɛkst ˈɡɹæmə/
en-US/ˈɪndɛkst ˈɡɹæmɚ/
generalization of context-free grammars in that nonterminals are equipped with lists of flags, or index symbols