Hi, I`m getting an error when I make one mapping using subclass. I have one inheritance between my classes and here is my map..

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Business.Equipament, Business" table="EQUIPAMENT" lazy="true">
<id name="id" column="ID" type="integer">
<generator class="increment" />
</id>

<property name="code" column="CODE" type="String" length="200"/>
<property name="name" column="NAME" type="String" length="200"/>
<property name="type" column="TYPE" type="String" length="200"/>
<property name="info" column="INFO" type="String" length="200"/>
<property name="status" column="STATUS" type="String" length="1" />

<subclass name="Business.Tank, Business" table="TANK">
<property name="tagVolume" column="TAG_VOLUME" type="String" length="200" />
</subclass>


<bag name="tagList" cascade="all" lazy="true" inverse="true">
<key column="ID_TAG"/>
<one-to-many class="Business.Tag,Business"/>
</bag>



</class>
</hibernate-mapping>

The subclass`s map here

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Business.Tank, Business" table="TANK" lazy="true">


<property name="tagVolume" column="TAG_VOLUME" type="string" length="200"/>

</class>
</hibernate-mapping>

when I execute my system this message shows up..

System.TypeInitializationException: The type initializer for 'Service' threw an exception. ---> NHibernate.MappingException: Business.Register.Equipment.Equipament.hbm.xml(14,46): XML validation error: The 'table' attribute is not declared. ---> System.Xml.Schema.XmlSchemaValidationException: The 'table' attribute is not declared.
--- End of inner exception stack trace ---
at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception)
at NHibernate.Cfg.Configuration.ValidationHandler(Object o, ValidationEventArgs args)
at System.Xml.Schema.XmlSchemaValidator.SendValidationEvent(XmlSchemaValidationException e, XmlSeverityType severity)
at System.Xml.Schema.XmlSchemaValidator.SendValidationEvent(String code, String arg)
at System.Xml.Schema.XmlSchemaValidator.ValidateAttribute(String lName, String ns, XmlValueGetter attributeValueGetter, String attributeStringValue, XmlSchemaInfo schemaInfo)
at System.Xml.Schema.XmlSchemaValidator.ValidateAttribute(String localName, String namespaceUri, XmlValueGetter attributeValue, XmlSchemaInfo schemaInfo)
at System.Xml.XsdValidatingReader.ValidateAttributes()
at System.Xml.XsdValidatingReader.ProcessElementEvent()
at System.Xml.XsdValidatingReader.ProcessReaderEvent()
at System.Xml.XsdValidatingReader.Read()
at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
at System.Xml.XmlDocument.Load(XmlReader reader)
at NHibernate.Cfg.Configuration.LoadMappingDocument(XmlReader hbmReader, String name)
at NHibernate.Cfg.Configuration.AddXmlReader(XmlReader hbmReader, String name)
at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name)
at NHibernate.Cfg.Configuration.AddResource(String path, Assembly assembly)
at NHibernate.Cfg.Configuration.AddAssembly(Assembly assembly)
at NHibernate.Cfg.Configuration.AddAssembly(String assemblyName)
at Business.NHibernateSession.initSession() in C:\Projetos\Petrobras\SGECR\Business\Base\NHibernateSession.cs:line 62
at Business.NHibernateSession..ctor(User p_User) in C:\Projetos\Petrobras\SGECR\Business\Base\NHibernateSession.cs:line 24
at Business.SessionManager..ctor() in C:\Projetos\Petrobras\SGECR\Business\Base\SessionManager\SessionManager.cs:line 23
at Service..cctor() in c:\Projetos\Petrobras\SGECR\Facade\App_Code\Service.cs:line 17
--- End of inner exception stack trace ---

if someone knows what can be happening, explain me!! thanks ...