Category.hbm.xml

<?xml version="1.0"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-lazy="false">
	<class name="NHibernate.DomainModel.Category, NHibernate.DomainModel" table="category" dynamic-update="true" dynamic-insert="true">
		<id name="Id" unsaved-value="0" column="category_key_col">
			<generator class="native"/>
		</id>
		<list name="Subcategories" lazy="true" cascade="save-update,merge,delete,lock">
			<key column="parent"/>
			<index column="ord"/>
			<one-to-many class="NHibernate.DomainModel.Category, NHibernate.DomainModel"/>
		</list>
		<property name="Name"/>
		<many-to-one name="Assignable" column="`assign able id`"/>
	</class>
	<class name="NHibernate.DomainModel.Assignable, NHibernate.DomainModel" table="`assign able`">
		<id name="Id">
			<generator class="assigned"/>
		</id>
		<bag name="Categories" inverse="true" cascade="all" lazy="true">
			<key column="`assign able id`"/>
			<one-to-many class="NHibernate.DomainModel.Category, NHibernate.DomainModel"/>
		</bag>
	</class>
	<sql-query name="namedsql">
		<return alias="category" class="NHibernate.DomainModel.Category, NHibernate.DomainModel"/>
		<return alias="assignable" class="NHibernate.DomainModel.Assignable, NHibernate.DomainModel"/>
		select {category.*}, {assignable.*} from Category {category}, "assign able" {assignable}
	</sql-query>
</hibernate-mapping>