marechai/Marechai.Database/Models/Book.cs

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace Marechai.Database.Models
{
    public class Book : DocumentBase
    {
        [StringLength(13, MinimumLength = 10)]
        public string Isbn { get;       set; }
        public short? Pages      { get; set; }
        public int?   Edition    { get; set; }
        public long?  PreviousId { get; set; }
        public long?  SourceId   { get; set; }

        public virtual Book                              Previous        { get; set; }
        public virtual Book                              Source          { get; set; }
        public virtual Book                              Next            { get; set; }
        public virtual Iso31661Numeric                   Country         { get; set; }
        public virtual ICollection<Book>                 Derivates       { get; set; }
        public virtual ICollection<CompaniesByBook>      Companies       { get; set; }
        public virtual ICollection<PeopleByBook>         People          { get; set; }
        public virtual ICollection<BooksByMachine>       Machines        { get; set; }
        public virtual ICollection<BooksByMachineFamily> MachineFamilies { get; set; }
    }
}