The court of appeals did not have jurisdiction to decide the merits of the defendant's appeal of the trial court's post-judgment order denying his time-credit motion. The standard for determining jurisdiction is not whether the appeal is precluded by law but whether the appeal is authorized by law. The Court of Criminal Appeals found no rule, statute or constitutional provision that would authorize the defendant's appeal from the trial court's post-judgment order denying his time-credit motion. Abbott v. State - PD-1816-07.