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inf225public / glossary / Nonterminal footprint

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Nonterminal footprint*

A non-recursive measure of Nonterminal symbol usage in a grammatical expression: a multiset of presence indicators (1 for the nonterminal itself, ? for its optional use, * for its Kleene closure, etc). A usefulness of a footprint for grammar matching depends on how rich the metalanguage is.

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