The table below lists the item names, types and description. All item names can be abbreviated.
Item Type Description PRIMITIVE _CHAR Is object a primitive STRUCTURED _CHAR Is object a structure NDIM _INTEGER Dimensionality DIMS _CHAR Dimensions separated by commas NELM _INTEGER Product of dimensions TYPE _CHAR The HDS type of the object VALUE _CHAR The object's value MIN,MAX _REAL Return minimum or maximum of array