Vol is a of with functions , keys and example object that represents in Deriscope usage the commonly known "volatility" of the stochastic process associated with a given Quotable at some fixed future time (maturity).
The stochastic process is defined inside an input parameter of type .
If that process is multidimensional (driven by several risk factors) then the overall volatility is also multidimensional.
The type of volatility used here refers to a single component of the overall volatilty, in other words a volatility with respect to some single risk factor.
That risk factor is also specified in Vol Spec.
Finally due to the several different ways that a volatility may be mathematically defined, the Vol Spec also provides the exact type of volatility.
More details on the mathematical definition of volatility can be found in Vol Spec.