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''Accessio'' is a concept from Ancient Roman property law that decided ownership of an object or work that is somehow related to another object or work; one thing is considered the principal, and the other is considered to be an accession or addition to it. In general the owner of the principal thing, whichever it is, became the owner of the accession also. Accessio was not a specific rule, instead it was a principle with a number of special cases that had their own particular guidelines for determination of ownership. The most undisputed kind of accessio arises from the union of a thing with the ground; and when the union between the ground and the thing is complete, the thing belongs whoever owns the ground. Thus if a someone builds on ground that someone else owns, the building belongs to the owner of the ground, unless it is a building of a moveable nature, as a tent; for the rule of law is "''superficies solo cedit''." A tree belonging to one person, if planted in the ground of another person, belongs to the owner of the ground as soon as it has taken root. The same rule applies to seeds and plants. If someone wrote on the papyrus (''chartulae'') or parchment (''membranae'') of another, the material was considered the principal, and of course the writing belonged to the owner of the paper or parchment. If a person painted a picture on someone else's wood (''tabula'') or whatever the materials might be, the painting was considered to be the principal (''tabula picturae cedit''). The principle which determined the acquisition of a new property by accessio was this—the intimate and inseparable union of the accessory with the principal. Accordingly, there might be ''accessio'' by pure accident without the intervention of any rational agent. If a piece of land was torn away by a stream from someone's land and attached to the land of another, it became the property of the person to whose land it was attached after it was firmly attached to it, but not before. This should not be confused with the case of ''alluvio''. The person who lost their property by accessio had as a general rule a right to be indemnified for their loss by the person who acquired the new property. The exceptions were cases of ''mala fides''. The term ''accessio'' is also applied to things which are the products of other things, and not added to them externally as in the case just mentioned. Every ''accessio'' of this kind belongs to the owner of the principal thing; the produce of an animal, a field or a tree belong to the owner. In some cases someone might have a right to the produce (''fructus'') of a thing, though the thing belongs to another. (usufructus) The term ''accessiones'' was also applied to those who were sureties or bound for others, as ''fidejussores''. (confusio) ==See also== *Accession (property law) *Quicquid plantatur solo, solo cedit 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Accessio」の詳細全文を読む スポンサード リンク
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