 Before the emergence of the formalized philosophical systems or the darśanas, we see a number of philosophical issues relating to language implicitly and explicitly brought out by the early Sanskrit grammarians, namely Pāṇini, Kātyāyana and Patañjali. Pāṇini (400 bce) composed his grammar of Sanskrit with a certain notion of Sanskrit as an atemporal language. For him, there were regional dialects of Sanskrit, as well as variation of usage in its scriptural (chandas) and contemporary (bhāṣā) domains. All these domains are treated as sub-domains of a unified language, which is not restricted by any temporality.