What is cast and sub-cast of das?

It seems like you're asking about the "cast and sub-cast" of a term related to the word "Das". It's important to clarify that "Das" alone doesn't have a specific meaning in terms of social hierarchy or caste systems.

To give you a helpful answer, I need more context. Please tell me:

* What is the full term you are referring to? Is it "Das" followed by another word or phrase?

* What is the context of this term? Are you asking about a specific community, region, or language?

For example, if you are referring to a specific community like "Dasnami", then we can talk about their caste system.

Once you provide me with more information, I can give you a more accurate and relevant response.