NHibernate マッピングの書き方

<?xml version="1.0"?>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
  namespace="NHibernate.Entity" assembly="TestNHibernate">

<class 
    name="MyTable" 
    table="MY_TABLE"
    lazy="false"
>
    <!-- ID -->
    <id
        name="Id"
        column="ID"
        length="32"
    >
        <generator class="uuid.hex" />
    </id>

    <!-- stringプロパティ -->
    <property
        name="Name"
        type="string"
        column="NAME"
        not-null="true"
        length="15"
    />

    <!-- intプロパティ -->
    <property
        name="Price"
        type="int"
        column="PRICE"
        not-null="false"
        length="4"
    />

    <!-- stringプロパティ -->
    <property
        name="Flag"
        type="string"
        column="FLAG"
        not-null="true"
        length="1"
    />

    <!-- timestampプロパティ -->
    <property
        name="UpdateDatetime"
        type="timestamp"
        column="UPDATE_DATETIME"
        not-null="true"
        length="3"
    />


</class>
</hibernate-mapping>

using System;

namespace NHibernate.Entity {
    [Serializable]
    public class MyTable
    {
        //ID（プライマリ・キー）
        private string id;
        public string Id
        {
            get
            {
                return id;
            }
            
            set
            {
                this.id = value;
            }
            
        }


        //名前
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            
            set
            {
                this.name = value;
            }
            
        }

        //価格
        private Int32 price;
        public Int32 Price
        {
            get
            {
                return price;
            }
            
            set
            {
                this.price = value;
            }
            
        }

        //フラッグ
        private string flag;
        public string Flag
        {
            get
            {
                return flag;
            }
            
            set
            {
                this.flag = value;
            }
            
        }

        //タイムスタンプ
        private DateTime updateDatetime;
        public DateTime UpdateDatetime
        {
            get
            {
                return updateDatetime;
            }
            
            set
            {
                this.updateDatetime = value;
            }
            
        }


    }
}