RASA

Rasa is a term with multiple meanings in different contexts. In Sanskrit, rasa means essence, taste, or juice. In Indian aesthetics and philosophy, rasa refers to the emotional or aesthetic flavor experienced by an audience in response to a work of art, such as poetry, theatre, dance, or cinema.

Rasa theory originated in ancient Indian dramaturgy, most notably in the Natya Shastra attributed to Bharata Muni. It posits that artworks evoke specific emotional moods, or rasas, in spectators. The classical framework identifies a set of rasas, commonly described as nine: shringara (romantic), hasya (humor), karuna (compassion), raudra (anger), vira (heroic), bhayanaka (fearful), bibhatsa (disgust), adbhuta (wonder), and shanta (peace). Different artistic traditions emphasize particular rasas or blends, and the concept has influenced literature, performance, and visual arts by guiding tone, expression, and audience experience.

Rasa is also the name of an open-source framework for building conversational artificial intelligence. Rasa provides tools for natural language understanding, dialogue management, and integration with messaging platforms, enabling developers to create chatbots and virtual assistants. The platform supports machine-learning based policies, custom actions, and deployment on-premises or in cloud environments. Rasa X is a companion tool used to improve assistants in production by collecting conversations and annotating data. Rasa Open Source is released under an open-source license and has a growing ecosystem of plugins and community-contributed components.