Many-to-many mapping with extra columns in join table

Question

Here is the domain that I wish to have:

public class Person
{
    public int Id { get; set; }
    public IList AcquiredCertificates {          


        

Answer 1

I would rename CertificatesAcquiredByPeople something
like CertificatesAcquiredEvent (it implies that there is more than one key and a datetime)

I agree it needs to be a seperate Entity as far as NHibernate is concerned.