i am trying to map a one table to the other , basic two primary keys. projectid to project id. how do i define that in the xml?

<class name="ProjectExts" table="project_exts" lazy="false">
<id name="ProjectID" column="PROJ_ID">
<generator class="foreign">
<param name="property">NewProjects</param>
</generator>
</id>
<property name="ProjectManagerName" column="PROJ_MGR_NAME" type="String"/>
<property name="ConstStatusCode" column="CONST_STAT_CD" type="String"/>
<property name="RecStatus" column="REC_STATUS" type="String"/>

and the other table

<class name="NewProjects" table="NEW_PROJECTS" lazy="false">
<id name="ProjExtId" column="PROJ_EXT_PROJ_ID">
<generator class="assigned"/>
</id>
<property name="Description" column="DESCR" type="String"/>
</class>

now the classes are.

[Serializable]
[DataContract(Namespace = "")]
public class NewProjects
{

[DataMember]
public string Description { get; set; }

[DataMember]
public string ProjExtId { get; set; }


}

and the other is
[Serializable]
[DataContract(Namespace = "TProDataTransferObjects")]
public class ProjectExts
{
[DataMember]
public string ProjectID { get; set; }

[DataMember]
public string ProjectManagerName { get; set; }


[DataMember]
public string ConstStatusCode { get; set; }

[DataMember]
public string RecStatus { get; set; }


}

and in my wcf i am trying to call the service to return the list for me.

[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
[NHibernateContext]
[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
public class NewProject
{
[OperationContract]
public void ViewNewProject()
{

using (ISession session = NHibernateContext.Current().Session)
{
IQuery query;
query = session.CreateQuery("from ProjectExts where RecStatus IN ('New','Ready To Approve','Ready To Schedule','Scheduled')");
var list=query.List();

}


}
}

i am new to nhibernate and i am trying to select to show 4 fields
ProjectManagerName ,
ConstStatusCode ,
RecStatus ,
Description

having lots of issues of where to add the mapping and the xml to show all fields.


thanks