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Checks the values on a certificate of analysis or test report against specification limits clause by clause (up to 200 clauses), for an agent accepting a lot or a supplier's material. Each clause has a parameter, an optional min and max and a unit; each result has a value, an optional reported uncertainty and an optional less-than or greater-than qualifier ("<0.01"). rule simple (default): the reported value is compared with the limits and uncertainty is ignored. rule guard-banded: a clause passes only if value +/- uncertainty lies inside the limits, fails only if it lies wholly outside, and is indeterminate when the interval straddles a limit. A missing result, a unit with no supplied conversion, a guard-banded result with no reported uncertainty (state "0" for an exact value), or a censored value that cannot be placed against a limit is indeterminate, never pass. Overall: fail if any clause fails, unknown if any is indeterminate, else pass. Does not validate the laboratory, the method or the certificate's authenticity.