17. Determination of the question as to whether the facts pleaded constitute a part of the cause of action, sufficient to attract clause (2) of Article 226 of the Constitution, would necessarily involve an exercise by the High Court to ascertain that the facts, as pleaded, constitute a material, essential or integral part of the cause of action. In so determining, it is the substance of the matter that is relevant. It, therefore, follows that the party invoking the writ jurisdiction has to disclose that the integral facts pleaded in support of the cause of action do constitute a cause empowering the High Court to decide the dispute and that, at least, a part of the cause of action to move the High Court arose within its jurisdiction. Such pleaded facts must have a nexus with the subject-matter of challenge based on which the prayer can be granted. Those facts which are not relevant or germane for grant of the prayer would not give rise to a cause of action conferring jurisdiction on the court. These are the guiding tests.