4 The interdicts 'Uti possidetis' and 'Utrubi' are interdicts for retaining possession, and are employed when two parties claim ownership in anything, in order to determine which shall be defendant and which plaintiff; for no real action can be commenced until it is ascertained which of the parties is in possession, because law and reason both require that one of them shall be in possession and shall be sued by the other. As the role of defendant in a real action is far more advantageous than that of plaintiff, there is almost invariably a keen dispute as to which party is to have possession pending litigation: the advantage consisting in this, that, even if the person in possession has no title as owner, the possession remains to him unless and until the plaintiff can prove his own ownership: so that where the rights of the parties are not clear, judgement usually goes against the plaintiff. Where the dispute relates to the possession of land or buildings, the interdict called 'Uti possidetis' is employed; where to movable property, that called 'Utrubi.' Under the older law their effects were very different. In 'Uti possidetis' the party in possession at the issue of the interdict was the winner, provided he had not obtained that possession from his adversary by force, or clandestinely, or by permission; whether he had obtained it from some one else in any of these modes was immaterial. In 'Utrubi' the winner was the party who had been in possession the greater portion of the year next immediately preceding, provided that possession had not been obtained by force, or clandestinely, or by permission, from his adversary. At the present day, however, the practice is different, for as regards the right to immediate possession the two interdicts are now on the same footing; the rule being, that whether the property in question be movable or immovable, the possession is adjudged to the party who has it at the commencement of the action, provided he had not obtained it by force, or clandestinely, or by permission, from his adversary. 5 A man's possession includes, besides his own personal possession, the possession of any one who holds in his name, though not subject to his power; for instance, his tenant. So also a depositary or borrower for use may possess for him, as is expressed by the saying that we retain possession by any one who holds in our name. Moreover, mere intention suffices for the retention of possession; so that although a man is not in actual possession either himself or through another, yet if it was not with the intention of abandoning the thing that he left it, but with that of subsequently returning to it, he is deemed not to have parted with the possession. Through what persons we can obtain possession has been explained in the second Book; and it is agreed on all hands that for obtaining possession intention alone does not suffice.