How is the auto population of property details done upon submitting Subject Property address?

How is the auto population of property details done upon submitting Subject Property address?

PropMix checks the public record database to fetch the property details. This helps the appraiser to validate the details already available with them from the loan application. The property attributes include the number of bedrooms, number of bathrooms (half and full), lot size, living area, last sale date and last sale price.