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Use these routines...
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To access these subobjects...
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Node_Data Node_Data_Struct { /* structured data*/
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int FLDget_ndim (OMobj_id field,
 int *ndim);
 int FLDset_ndim (
 OMobj_id field,
 int ndim);
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int ndim; /*number of dimensions */
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int FLDget_dims (OMobj_id field,
 int **dims,
 int *size);
 int FLDset_dims (
 OMobj_id field,
 int *dims);
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int dims[ndim]; /* dimensions */
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int FLDget_nnodes (OMobj_id field,
 int *nnodes);
 int FLDset_nnodes (
 OMobj_id field,
 int nnodes);
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int nnodes => prod(dims); /* number of nodes */
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