ENTITY： 

 public   partial   class  InsuranceApprovalInvoice：OrderInsuranceApproval 
 {
 [DataMember（）] 
 public   virtual  PatientInvoice PatientInvoice { get ;  set ; } 

} 
 public   partial   class  InsuranceApprovalOrder：OrderInsuranceApproval 
 {
 [DataMember（）] 
 public   virtual 订单订单{ get ;  set ; } 

} 
 public   partial   class  InsuranceApprovalPackage：OrderInsuranceApproval 
 {
 [DataMember（）] 
 public   virtual  TreatmentPlanPackages TreatmentPlanPackages { get ;  set ; } 

} 

 MAPPER：

 DiscriminateSubClassesOnColumn（  ObjectTypeID）。AlwaysSelectWithValue（）
 .SubClass< insuranceapprovalinvoice>（（ int ）InsuranceApprovalTypeEnum.Invoice，
m = >  m.References（p = >  p.PatientInvoice，  InvoiceMasterID）。列（  ObjectID）。ReadOnly（））

 .SubClass< insuranceapprovalorder>（（ int ）InsuranceApprovalTypeEnum.Order ，
m = >  m.References（p = >  p.Order，  OrderID ）。列（  ObjectID）。ReadOnly（））

 .SubClass< insuranceapprovalpackage>（（ int ）InsuranceApprovalTypeEnum.Package，
m = >  m.References（p = >  p.TreatmentPlanPackages，  TreatmentPlanPackagesID）。列（  ObjectID）。ReadOnly（）） ; 
< /   insuranceapprovalpackage  >  < /   insuranceapprovalorder  >  < /   insuranceapprovalinvoice  >  

I need to set more than one discriminate values for parent class. Is it possible to do and how?
For example:

PARENT_CLASS

DiscriminateSubClassesOnColumn("COLUMN_NAME", "X");

CHILD_CLASS_1

DiscriminatorValue("Y");

CHILD_CLASS_2

DiscriminatorValue("Z");

This is possible. But what if i have more than these 3 values in column "COLUMN_NAME"?

For example if "P" and "Q" are also possible values for that column what should i write?

DiscriminateSubClassesOnColumn("COLUMN_NAME", "X","P","Q"); Obviously this is not possible to write. But i don't know how to do this. Can someone help me?

Thanks.

ENTITY:

public partial class InsuranceApprovalInvoice : OrderInsuranceApproval
    {
        [DataMember()]
        public virtual PatientInvoice PatientInvoice { get; set; }

    }
    public partial class InsuranceApprovalOrder : OrderInsuranceApproval
    {
        [DataMember()]
        public virtual Order Order { get; set; }

    }
    public partial class InsuranceApprovalPackage : OrderInsuranceApproval
    {
        [DataMember()]
        public virtual TreatmentPlanPackages TreatmentPlanPackages { get; set; }

    }

MAPPER:

DiscriminateSubClassesOnColumn("ObjectTypeID").AlwaysSelectWithValue()
                .SubClass<insuranceapprovalinvoice>((int) InsuranceApprovalTypeEnum.Invoice,
                m => m.References(p => p.PatientInvoice, "InvoiceMasterID").Column("ObjectID").ReadOnly())
                    
                .SubClass<insuranceapprovalorder>((int) InsuranceApprovalTypeEnum.Order,
                    m => m.References(p => p.Order, "OrderID").Column("ObjectID").ReadOnly())

                .SubClass<insuranceapprovalpackage>((int) InsuranceApprovalTypeEnum.Package,
                    m => m.References(p => p.TreatmentPlanPackages, "TreatmentPlanPackagesID").Column("ObjectID").ReadOnly());
</insuranceapprovalpackage></insuranceapprovalorder></insuranceapprovalinvoice>