The doctrine of RES JUDICATA - that no court shall try any suit or issue which has been directly and substantially in issue and finally decided in a former suit - is contained in which section of the Code of Civil Procedure, 1908?

Res judicata is enacted in Section 11 of the Code of Civil Procedure. It bars the re-litigation of a matter directly and substantially in issue between the same parties (or persons claiming under them), which was heard and finally decided by a court competent to try the subsequent suit. It rests on the twin principles that there must be an end to litigation and that no one should be vexed twice for the same cause. Section 10, by contrast, deals with res sub judice (stay of a later suit pending a former suit). The section does not shut out an appeal, which is a continuation of the original suit.