.. _model-surrogate-global-correction-second_order:

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second_order
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Specify that truth values, gradients and Hessians must be matched.


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**Specification**

- *Alias:* None

- *Arguments:* None


**Description**


The correction specification specifies that the approximation will be
corrected to match truth data. The keyword ``second_order`` matching
ensures that truth values, gradients and Hessians are matched.