Adding a keyword in sif to change bodywise element type definitions for solvers. The used convention is given in Body section in the following form, Solver n: Element = String, where String is the conventional element type definition.

git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@7060 04224531-1f84-46d8-96ce-875b9e37dce3