Performance of a raga assumes improvisation, but this improvisation is restricted to a limited set of well-known patterns (let’s use this word for the sake of simplicity). I am not a musicologist, but one might say there is a canon here. This is very different from the improvisation as it comes from jazz music or Japanese improvised music. It is no coincidence that we have the term Hindustani classical music. Jazz can be considered as antagonistic to Western classical music.
The system behind Indian music is just different. It does not map well to the MB model of track-recording-work which was obviously built with European/Western/First World/use-the-word-you-like music in mind. For example, it does not make sense to have a work named “Raga Jog” as there will be only one recording of such a work. The recording is the work – if one still wants to use the concept of a work (which is also questionable).
All in all, if you want to understand better what raga is you can start with Wikipedia and raga.hu which provides listening examples.