The following adds an 'addressline' property to a Person type. The person type is
identified by its namespace, 'PersonNS', and type name, 'PersonType'. The type of the
'addressline' property is a many-valued SDO data type (primitive) with namespace
'commonj.sdo' and type name 'String'.
<?php
$df->addPropertyToType('PersonNS', 'PersonType',
'addressline', 'commonj.sdo', 'String', array('many'=>true));
?>