The second Vdata, Creator , holds the name and version of the tool that created the data set, and is intended to be used as a hint to the data sets contained within. It is also limited to 255 characters. The last Vdata, Notes , is open to a general description of the data, its simulation techniques, and any other information of general interest about the simulation data. It has no length restriction. Frames Any other Vgroup at the top level with class name Frame is a frame .
Frames provide a means for sequencing of groups of simulation data.
For example, in semiconductor process simulation, the frames may represent the state of the wafer after certain processing steps. At least one frame must be present and each of the frame Vgroups must have a unique name. A Vgroup named Structure under a Frame Vgroup stores the meshes or geometry in each frame. A Structure Vgroup must have at least one Vgroup that is one of Mesh , or Geometry . The Mesh Vgroup will store an unstructured mesh and the Geometry Vgroup will store the structure's geometry.