<class abstract="true" name="MultimediaContent">
  <id name="id" type="long">
   <meta attribute="scope-set">protected</meta>
   <generator class="seqhilo">
    <param name="sequence">multimedia_content_seq</param>
    <param name="max_lo">100</param>
   </generator>
  </id>
  <discriminator column="MEDIA_TYPE" force="false" insert="true"
   length="1" not-null="true"/>
  <many-to-one class="MultimediaContainer" name="container" not-null="false"/>
  <property generated="never" lazy="false" name="filename" type="string"/>
  <property generated="never" lazy="false" name="size" type="long"/>
</class>
<subclass discriminator-value="I" extends="MultimediaContent"
  name="ImageContent" select-before-update="false"/>
<subclass discriminator-value="A" extends="MultimediaContent"
  name="AudioContent" select-before-update="false"/>
<subclass discriminator-value="V" extends="MultimediaContent"
  name="VideoContent" select-before-update="false"/>