Attribute whereNode = node.attribute( "where" );
if ( whereNode != null ) entity.setWhere( whereNode.getValue() );
// CHECK
Attribute chNode = node.attribute( "check" );
if ( chNode != null ) table.addCheckConstraint( chNode.getValue() );
// POLYMORPHISM
Attribute polyNode = node.attribute( "polymorphism" );
entity.setExplicitPolymorphism( ( polyNode != null )
&& polyNode.getValue().equals( "explicit" ) );