Use JAXB objects for the REST services and mappers to convert from domain objects to api objects. Add a Trigger service and return JSON from the REST services.
Add executions to the Job returned by the REST service.
Rename mappers to builders and add subclass attributes to TriggerBuilder
Return JSON and Days of Week should be a List rather than a String
Use inherritence in the xsd and force the automatic creation of @XmlRootElement