By Anjum Altaf If you read the last installment you would have picked up a clue to what a raga is about. Keep five swaras (S g M d n) in the air and you are beginning to work with the raga Malkauns. Ergo, it seems reasonable to infer that if you picked a different set of swaras, you would be working with a different raga. Of course, sculpting a fine raga out of these building blocks requires a few more details that we will discuss later but this is a good enough point to start. However, if we proceed in this ad hoc way, we would be able to list lot of ragas but we would miss out on the schema that organizes the large number of ragas into more manageable sets. In particular, we would miss out entirely on identifying ragas that are related closely to each other.