Hi everybody,
The requirements usually contain several attributes that also define them. This attributes can be checked by a parameterized metric (Correctness) in RQA very easy, using different operators such as "equal than" (=), "different than" (!=), "greater than" (>), etc...
There is another operator that is Regular Expression. This operator will allow you to analyze the value of the attribute and check if it matches to the defined Regula Expression.
I have attached an example of a metric that checks if the requirement follows an STANDARD specified in a dedicated attribute.
Hope you find this information useful.
Cheers