The flavor identical describes the object expr itself.

This flavor can be used as an argument to RandomTools[Generate] or as part of a structured flavor.

$\mathrm{with}\left(\mathrm{RandomTools}\right)\:$

$\mathrm{Generate}\left(\mathrm{posint}\left(\mathrm{range}=10\right)+\mathrm{posint}\left(\mathrm{range}=10\right)'\sin '\left(x\right)\right)$

Error, (in RandomTools:-Generate) the flavor `x` does not exist

$\mathrm{Generate}\left(\mathrm{posint}\left(\mathrm{range}=10\right)+\mathrm{posint}\left(\mathrm{range}=10\right)'\sin '\left(\mathrm{identical}\left(x\right)\right)\right)$

$6+2\sin \left(x\right)$

$\mathrm{Matrix}\left(3\,3\,\mathrm{Generate}\left(\mathrm{posint}\left(\mathrm{range}=7\right)\mathrm{identical}\left(x\right)+\mathrm{posint}\left(\mathrm{range}=7\right)\,\mathrm{makeproc}=\mathrm{true}\right)\right)$

$\left[\begin{array}{ccc}3x+4& 4x+6& 5x+3\\ x+5& 2x+3& 2x+2\\ 4x+3& 3x+1& 2x+5\end{array}\right]$