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# File Formats

The following file-format to store or read geometric entities is available:

- fbd-format, this format consists of a collection of commands explained in the section ``Commands'' and it is mainly used to store geometrical information like points, lines, surfaces and bodies. But it can also be used to define a batch job.

Common CAD formats will be supported by stand-alone interfaces which translate into fbd-commands. So far a vda-to-fbd interface is available.

The following file-formats can be written to define the mesh and certain boundary-conditions:

- Abaqus, which is also used by the CalculiX solver ccx,
- Ansys,
- duns, a free cfd-code [4],
- Nastran,
- tochnog, a free fem-code [5]. So far, only 8-noded brick-elements are supported.

The following file-formats to read solver results are available:

- frd-format, files of that format are used to read results of previous calculations like displacements and stresses. This format is described in section ``Result Format''
- duns, a free cfd-code [4],

The following file-formats can be read to check the mesh and certain boundary-conditions:

- Abaqus, this is also used by the CalculiX solver ccx,

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