Blurb::
Specify an exponential covariance in the case where the random field is built from an analytic covariance functio.
THIS IS AN EXPERIMENTAL CAPABILITY.
Description::
THIS IS AN EXPERIMENTAL CAPABILITY UNDER ACTIVE DEVELOPMENT.

*Default Behavior*
Currently, the ``build_source`` that is fully working is the
``dace_method_pointer``.  The others are not fully operational.
Topics::

Examples::

Theory::

Faq::

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