Build a protocol specific check from a base one.
Build a protocol specific check from a base one. Usually just decorate the base one and add some more information.
Transform the raw response into something that will be used as check input, e.
Transform the raw response into something that will be used as check input, e.g. building a DOM tree from an HTTP response body. The result might be cached and reused for other checks of the same kind performed on the same response.