Obtain the storage form of an NDF array component NDF_FORM
’SIMPLE’). ’DATA’, ’QUALITY’ or ’VARIANCE’. The symbolic constant NDF__SZFRM may be used for declaring the length of a character variable to hold the storage form of an NDF array component. This constant is defined in the include file NDF_PAR.
At present, the NDF_ routines only support "primitive", "simple", "delta" and "scaled" arrays, so
only the values ’PRIMITIVE’, ’SIMPLE’, ’DELTA’ and ’SCALED’ can be returned.