Types of information:

There are different kinds of information units defined. They are following:

Class 0

The geometric primitives required for describing 2- and 3-dimensional objects such like points, circles, lines, parabolas, planes and surfaces.

Class 1

Complicated geometric entities for describing complex curves, shells, faces , complex solids, and so on.

Class 2

Graphical aids to map product information onto technical presentations. These aids involved view block definitions, line fonts, block definitions, cross hatching, characters for describing symbols and so on.

Class 3

Grouping mechanisms to assist the mathematical operations required for the manipulation of the design objects. Typical representations are coordinate transformations, general matrices, tabulated functions, scalar series, material properties, physical quantities, and so on.

Class 4

Descriptive aids to represent angles, diameters labels, text, surface finishes, cross-hatching, and so on.

Class 5

Elements describing the structural relations such like calling block, group, attribute and homogeneous entities.

Class 6

Associating elements to describe logic among the elements of any class.

Class 7

FEM elements to build up the FEM model. Typical elements are finite elements, model for particular element, computations, definition of a computation, damping, loads Eigenvalue, knot renumbering etc.

 Class 80

Gives the user the possibility of describing his own elements.

Class 99

Management aids to structure SET files. They include SET header, ensemble header in addition to 'End' specified for ensemble and a 'SET'.