The Pali Tipitaka or the Scripture of Theravada is comprised of three parts: the Vinaya Pitaka, Sutta Pitaka and Abhidhamma Pitaka. Amongst these Abhidhamma Pitaka is seen as the later addition. Some of the Buddhist scholars are of the view that the first two Pitakas only existed during the First Buddhist Council. Hence the Pali Abhidhamma Pitaka was not recognized by any other school of Buddhism other than the Theravada School.
There are several commentaries that accompany the Tipitaka text. Of these the first one was written by Buddhaghosa Thera in the 4th or 5th centuries. These commentaries have become a part of the Theravada culture.
Through these scriptures it becomes easier to comprehend the cultural heritage of Theravada Buddhism. The segments of Sutta Pitaka and Vinaya Pitaka were common to early Buddhist tradition. As a result these are not unique to Theravada School of Buddhism.