All About Bharatiya Sanatana Dharmam otherwise known as Hinduism : 2.1.17 & 18.

CHAPTER 2. HINDU SCRIPTURES : 1.17 & 18.
     1.The Scriptures : 17 &18.
17. Vyakhyana or Tika & 18. Tippani.

17.

A Vyakhyana is a running explanation in an easier language of what is said in the original, with little elucidations here and there. A Vyakhyana, particularly of a Kavya, deals with eight different modes of dissection of the Sloka, like Pada-Chheda, Vigraha, Sandhi, Alankara, Anuvada, etc. This forms an important aspect in the study of Sanskrit Sahitya Sastra. An Anu-Vyakhyana—like the one written by Sri Madhva—is a repetition of what is already written, but in greater detail. An Anuvada is merely a running translation or statement of an abstruse text of the original. Tika is only another name for Vyakhyana. The best Vyakhyanas are of Vachaspati Misra on the Darsanas, especially on Sankara’s Brahmasutra-Bhashya.

18.

Tippani is just like a Vritti, but is less orthodox than the Vritti. It is an explanation of difficult words or phrases occurring in the original. Examples are Kaiyata’s gloss on the Mahabhashya of Patanjali, Nagojibhatta’s gloss on Kaiyata’s gloss, or Appayya’s gloss on Amalananda’s gloss on the Bhamati of Vachaspati Misra.

Next : 19. Other Scriptures,  20. The Secular Writings & 21. The Kavyas.
Swami Sivananda
     To be continued...