I have been asked recently @ddiez about the difference between variable and parameter inside the RML. I believe I got asked by someone else. The truth it is that I am not 100% sure.
From my understanding, a parameter is something that is directly connected with the data member at the respective class. And a variable is something that can be used to define a number/expression that can be reused later on in the RML.
In other words, the parameter parName will be identified with the class member fParName.
On top of that, any definitions at <globals> will be transferred to any other sections. I.e. if I define a <parameter ...> at globals, this parameter will be placed at any other metadata class or process, if the corresponding metadata member does not exist in the corresponding class, it will just be ignored.
I guess the same applies to variable defined at globals, they are transported to any class.
Then, a parameter can be inserted at it RML section as a field. I.e. instead of doing:
<TRestXX>
<parameter name="parName" value="XX" />
</TRestXX>
we are allowed to do:
<TRestXX parName="XX" />
There are any other remarks or comments about this @nkx?
Tx!