Vidhāna in the context of "Shaunaka"

Shaunaka (Sanskrit: शौनक, IAST: śaunaka) is the name applied to teachers, and to a Shakha of the Atharvaveda. It is especially the name of a celebrated Sanskrit grammarian, author of the Ṛgveda-Prātiśākhya, the Bṛhaddevatā, the Caraṇa-vyūha, six Anukramaṇīs (indices) to the Rigveda, and the Vidhāna of the Rigveda. He is the teacher of Katyayana and Ashvalayana and is said to have combined the Bashkala and Shakala Shakhas of the Rigveda. In the Mahabarata, he is identified as the son of Ruru and Pramadvara, and in the Bhagavata Purana, he is identified as the grandson of Gritsamada and son of Sunaka, who belongs to the Bhrigu dynasty.