What distinguishes the ucr vs nibrs vs ncvs?

I'm not expert, but UCR has been used for decades to collect some basic info on every crime within its categories (major crimes). NIBRS is a newer initiative that tracks more detailed information, allowing for multiple vicims, multiple offenders,etc in order to capture more detailed info about each incident. Once implemented, more detailed questions can be answered about crime rather than jsut basic amanac statistics. ncvs is a random probability survey asked of household to determine if anyone has been the vicim of a crime. Thus its a better measure of the liklihood of being a victim that often inaccurate ccomplete inumerations such as nibs and ucr.