Deterministic Context-free Grammar
In formal grammar theory, the deterministic context-free grammars (DCFGs) are a proper subset of the context-free grammars. They are the subset of context-free grammars that can be derived from deterministic pushdown automata. They generate the deterministic context-free languages.
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“All the facts of nature are nouns of the intellect, and make the grammar of the eternal language. Every word has a double, treble or centuple use and meaning.”
—Ralph Waldo Emerson (1803–1882)