GetTypeInfo - get type dependent information about an element in an
array
SYNOPSIS
GetTypeInfoarrayname variable_name required_info
DESCRIPTION
For the element variable_name of the array arrayname, return
information on required_info. Each parameter has a data type which
is defined in the .def file (example data types are: _positivereal, _menu,
_space_group). The information available on each data type is dependent
on the class of the data type.