Blurb::
Integer-valued discrete design variables

Description::
A design variable whose values come from a specified set of admissible
integers. The details of how to specify this discrete variable are
located on the \ref topic-discrete_variables page.

Topics:: 	discrete_variables, design_variables

Examples:: 
Four integer variables whose values will be selected from the
following sets during the search for an optimal design. \f$y1 \in
\{0,1\}\f$, \f$y2 \in \{0, 1\}\f$, \f$y3 \in \{0,5\}\f$ and \f$y4 \in
\{10, 15, 20, 23\}\f$.

\verbatim
discrete_design_set 
  integer 4
    descriptors           'y1'  'y2'  'y3'  'y4'
    elements_per_variable 2     2     2     4
    elements              0 1   0 1   0 5   10 15 20 23
\endverbatim

Theory::
Faq::
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