Thank your for your response sir. Okay I got it . But do we have any best possible classification system or map . That is most complete. A map which has tried

Thank your for your response sir. Okay I got it . But do we have any best possible classification system or map . That is most complete. A map which has tried to capture totality of all known knowledge without leaving anything significant. I want this so I am not unaware of any field of knowledge. Atleast any significant field of knowledge Practically Best possible . As you suggest I read about librarianship And I got some maps But a question comes in mind that which map should I trust For my needs . Which map has that quality.