The was not the first description of Sanskrit grammar, but it is the earliest that has survived in full, and the culmination of a long grammatical tradition that Fortson says, is "one of the intellectual wonders of the ancient world." Pāṇini cites ten scholars on the phonological and grammatical aspects of the Sanskrit language before him, as well as the variants in the usage of Sanskrit in different regions of India. The ten Vedic scholars he quotes are Āpiśali, Kaśyapa, Gārgya, Gālava, Cakravarmaṇa, Bhāradvāja, Śākaṭāyana, Śākalya, Senaka and Sphoṭāyana. The of Panini became the foundation of Vyākaraṇa, a Vedānga.