Relational data in Unity

[autom]

Hi

What is the recommended way for storing Relational data in Unity. for an example something like a Tag system for the Todo list created in the UI-Toolkit editor where each tag will have a Many to many relationship to each todo list item/s ?

[autom]

Figured that NoSQL db approach using reference Arrays is good and can save runtime data unlike ScriptableObjects.

{
    "student_id": "S001",
    "name": "Alice",
    "enrolled_course_ids": ["C001", "C002"]
}
{
    "course_id": "C001",
    "course_name": "Math 101",
    "enrolled_student_ids": ["S001", "S002"]
}