attribute assigned, the variable name will be used as a default.</li>
<li><strong>scale_factor</strong> - If present for a variable, the data are to be multiplied by this factor after the data are read by the application that accesses the data. (see further discussion under the add_offset attribute)</li>
<li><strong>add_offset</strong> - If present for a variable, this number is to be added to the data after it is read by the application that accesses the data. If both scale_factor and add_offset attributes