Report on Ordering Key DS CE

In this document, we report the result of our core experiment on the Ordering Key DS. In the last meeting a decision is made to specialize the Weight DS [m6227] in a new DS in order to achieve ordering functionalities. This new DS is the Ordering Key DS which indicates which descriptors can be used in order to obtain an ordering of generic DSs (Segment, Concept, Object, Event). The main objectives of this CE are: an improvement of the syntax which is currently part of the XM document; to clarify explicitly the semantics of this DS so that users can understand what they should obey in their application; to demonstrate the benefit to have such component for ordering purposes.