Gilles, I've looked at the code for the new <discriminator> node for <resultMap>s and I can't get my head around it. I believe the idea came from the Hibernate people:
http://www.hibernate.org/hib_docs/reference/en/html/inheritance.html http://groups-beta.google.com/groups?q=Hibernate+discriminator >From reading those articles, is it correct to say that I use a discriminator to decide how sub-objects are populated? Is a <discriminator> used in conjunction with <subMap> nodes? This url: http://tinyurl.com/c9vk8 http://svn.apache.org/repos/asf/incubator/ibatis/trunk/cs/mapper/IBatisNet.DataMapper.Test/Maps/MSSQL/SqlClient/Document.xml has the following text: <resultMap id="document" class="Document"> <result property="Id" column="Document_ID"/> <result property="Title" column="Document_Title"/> <discriminator column="Document_Type" /> <subMap value="Book" resultMapping="book" /> <subMap value="Newspaper" resultMapping="newspaper" /> </resultMap> Can I replace that with this: <resultMap id="document" class="Document"> <result property="Id" column="Document_ID"/> <result property="Title" column="Document_Title"/> <discriminator column="Document_Type" /> </resultMap> Do I need to use <subMap> nodes when I use a <discriminator> node? If they are related, shouldn't I access it in a parent child relation: <!-- ??? --> <discriminator column="Document_Type"> <subMap value="Book" resultMapping="book" /> <subMap value="Newspaper" resultMapping="newspaper" /> </discriminator> I know that's not valid according to the schema: http://tinyurl.com/cufl2 http://svn.apache.org/repos/asf/incubator/ibatis/trunk/cs/mapper/IBatisNet.DataMapper/SqlMap.xsd but I don't understand why. Can anyone recommend an article or some better search terms for more information. Thanks, Ron
