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The internal representation of a mesh must allows us to find a particular value (quantity stored in the representation) rapidly, or to calculate a value easily from information presented (quantity deduced from stored information). A mesh is therefore, in general, an assembly of values and arrays of values containing the set of geometric elements which constitute it. The following information is necessary for each element:
|sub-domain number "volumetric" treatment|
|reference number "sub-volumetric" treatment|
The MODULEF code stores this information in a NOPO data structure, constituting the natural interface between the different mesh modules.
As many reference numbers are assigned as required in order to incorporate the entire set of descriptions.