There are two sutras having this title, one Mahayana and one Hinayana. Both have the same complete title: Mahāparinirvāṇa Sutra. Both sutras recount the events which took place and the teachings of the Buddha which he bestowed immediately prior to his entering nirvana. The perspective and scope of the two works is, of course, radically different. As to length, the Hinayana text is chapter length, while the Mahayana sutra is three volumes in English translation