Sanskrit prosody or Chandas refers to one of the six Vedanga, or limbs of Vedic studies. It is also an important part of the mantra – sitting in the mouth. It is the poetic metre and verse as well as its study, the latter becomes the vedanga while the former is a mantra-part. This field of study was central to the composition of the Vedas, the scriptural canons of Vedic texts.
The Chandas, as developed by the Vedic schools, included both linear and non-linear systems. The system was organized around seven major metres and each had its own rhythm, movements and aesthetics wherein a non-linear structure (aperiodicity) was mapped into a four verse polymorphic linear sequence. Sanskrit metres include those based on a fixed number of syllables per verse, and those based on fixed number of morae per verse.