(a) Except as may be more specifically provided by these rules in respect of specific actions, a pleading which sets forth a claim for relief, whether an original claim, counterclaim, cross-claim or third-party claim, shall contain a statement of the material facts known to the pleading party on which the claim is based, showing that the pleader is entitled to relief, and a demand for judgment for the relief to which the pleader claims entitlement; provided, however, that in any personal action a pleading shall not allege the amount of damages claimed, but shall state only that the damages claimed are within the jurisdictional limits of the court. Relief in the alternative or of several different types may be demanded.
(b) An amendment to a pleading relates back to the date o