2.4.1. Mesh Groups
[2.4. XMDF Organization]

Meshes will include 1D, 2D and 3D unstructured finite element meshes. For models that have multiple mesh types for the same simulation, we allow 1D, 2D, and 3D components to be stored in separate groups or as part of the same group.

Meshes consist of two main types of data: nodes and elements. For the nodes we need to define the nodal coordinates. For elements, we define the element type and the element topology (connectivity). We also include an option to store the coordinate system associated with a mesh. The mesh group layout is shown in Figure 1. It includes two subgroups, one for elements and the other for nodes.

Figure 1 Mesh Group Layout