Example <prm>
<long-name>long designation</long-name>
<short-name>short designation</short-name>
<prm-char>
<abs>10</abs>
<tol>5<tol>
<unit>oC</unit>
</prm-char>
</prm>
<prm>
<long-name>long designation</long-name>
<short-name>short designation</short-name>
<prm-char>
<min>0</min>
<typ>5<typ>
<max>0</max>
<unit>oC</unit>
</prm-char>
</prm>