"Res judicata pro veritate accipitur" is the full maxim which has, over the years, shrunk to mere "res judicata". Section 11 contains the rule of conclusiveness of the judgment, which is based partly on the maxim of Roman Jurisprudence "interest reipublicae ut sit finis litium" (it concerns the State that there be an end to law suits) and partly on the maxim "Nemo debet bis vexari pro una at eadem causa" (no man should be vexed twice over for the same cause). The section does not affect the jurisdiction of the court but operates as a bar to the trial of the suit or issue, if the matter in the suit was directly and substantially in issue (and finally decided) in the previous suit between the same parties litigating under the same title in a court, competent to try the subsequent suit in which such issue has been raised. The principle of res judicata is based on the need to give finality and certainty to judicial decisions.
RES JUDICATA AS DEFINED UNDER CODE OF CIVIL PROCEDURE, 1908
Section 11 of the Code of Civil Procedure embodies the doctrine of res judicata or the rule of conclusiveness of a judgement, as to the points decided either of fact, or of law, or of fact and law, in every subsequent suit between the same parties. It enacts that once a matter is finally decided by a competent court, no party can be permitted to reopen it in a subsequent litigation. In the absence of such a rule there
References: 1. http://www.Shareyouressays.com/11159/objectsandessentialconditionsofresjudicataindia.htm(1/4/2014) 2. http://lawmanblog.blogspot.in/2012/02/res-judicata-res-judicata-is-phrase.html(2/4/2014) 3. http://www.wisegeek.com/what-is-res-judicata.htm(2/4/2014)