These are of three kinds, depending upon the kinds of usages to which the Mantras are
put. For instance, Sages Aswalayana and San khyana have written the Sutras relating to
Hotru (performing) Prayoga; Sages Boudhayana, Apasthamba and Katyayana have
written of Adhwaryu (priestly) Prayoga, and Sages Latyayana and Vreehyayana have
written on the Oudgatru (musical) Prayoga
Besides these general texts there are certain special or specific texts called Pratishakya,
based on the Vedas. These deal in particular with the way in which particular Vedas are
to be recited in relation to grammar, phonetics etc. One may call them manuals. They
are d istinct from the general texts already mentioned. For instance, each of the three
first Vedas has its own Pratishakya written by Sages Saunaka, Katyayana etc.
There is another kind of text relating to the Vedas called Anukramanika or Indices. This
provides a list of Deities, Metres etc., of the different parts of the Vedas.
There are, again, some Vedic Koshas or lexicons other than Nirukta, which are very
useful in the interpretation of Vedic Mantras.
We have thus a comprehensive set of literature on the Ve dic methodology.
Two well -known Sanskrit commentaries on the Vedas are those of Sayanacharya and
Bhatta Bhaskara. Great Acharyas like Sri Sankara and Madhava have commented upon
important Upanishadic portions of the Vedic texts.
Four planets are said to pr eside over the Vedas; Guru or Jupiter over the Rig Vedas,
Sukra or Venus over the Yajur Veda, Mangal or Mars over Sama -Veda and Budha or
Mercury over Atharva -Veda.
Puranas
First among the supplementary Angas (limbs) come the Puranas. The essential
charac ter of Puranas has been defined that they should contain five essential features
viz., Sarga, Pratisarga, Vamsa, Manvantara and Vamsanucharita.
Puranas are eighteen in number. These are Brahma Purana (10 000 verses), Padma (55
000), Vishnu (23 000), Siva ( 24 000), Bhagawata (18 000), Linga (11 000), Varah (24
000), Naradiya (25 000), Markandeya (9000), Agni (15 400), Bhavishya (14 500),
Brahmavaivarta (18 000), Skanda (81 100), Vamana (10 000), Kurma (17 000), Matsya
(14 000), Garuda (19 000), and Brahmanda (12 000).
Sage Bhadrayana, or Vyasa as he is otherwise called, is credited with the authorship of
these Puranas.
Upa -Puranas
There are eighteen (or nineteen) Upa -Puranas or sub -Puranas. These are Sanatkumara,
Narasimha, Nandikeshwara, Sivadharma, Durvasa , Narada, Kapila, Manava, Ushanasa,
Brahma, Varuna, Kali, Vasishtha, Linga, Samba, Soura, Parasara, Maricha and Garga.
Nyaya