California Code, Government Code - GOV § 69842

The clerk of the superior court shall keep such indexes as will insure ready reference to any action or proceeding filed in the court.  There shall be separate indexes of plaintiffs and defendants in civil actions and of defendants in criminal actions.  The name of each plaintiff and defendant shall be indexed and there shall appear opposite each name indexed the number of the action or proceeding and the name or names of the adverse litigant or litigants.