Vocabulary IDEAS ================= 'geometry' set of geometric entities on which the mesh is based. They can be curves ('curve'), surfaces ('mesh area'), volumes ('meshvolume'). 'curve' linear geometric entity that can be composed of sub-entities, segments, circular arcs, options. The meshes that rely on these sub-entities are segments with 2 or 3 nodes. 'mesh area' surface geometric entity bordered by 'curves' on which the surface cells are based: triangles with 3 or 6 knots or quadrangles with 4 or 8 knots. 'mesh volume' volume geometric entity bordered by 'meshareas'. The volume cells based on these sub-entities are hexahedra with 8 or 20 knots, pentahedra with 6 or 15 knots, or tetrahedra with 4 or 10 knots. 'group' any grouping (chosen by the user) of geometric entities, nodes or meshes; the user gives it a name. 'universal file' The formatted file produced by IDEAS is the interface data file. It contains all the mesh (nodes and meshes), geometric entities, geometric entities, groups, and associations - geometric entities - mesh. 'geometric entity - mesh' association list of nodes or meshes based on a given geometric entity. * for each 'curve', the nodes that compose it, * for each 'mesharea': * the nodes that compose it, * in 2D the meshes that compose it. * for each 'meshvolume': * the knots and the stitches that make it up. * the nodes that compose it, * in 3D the meshes that compose it.