1 Overview

The Data Service Directory is a Common Service defined in the OOTS HLA. It maintains a catalog of Evidence Providers with the Evidence Types they are able to provide upon request using their Data Services. It is used in the Evidence Exchange process by the Evidence Requesters to discover the Evidence Providers that can provide the evidences they require, together with the required metadata and attributes imposed by the Data Services, like the classifications and context determinations of the Evidence Providers.

The information data model is based on the OOTS generic metadata model and its Application Profile for the DSD. The Service API is implemented using the OASIS RegRep 4.0 Query Protocol with the REST API Binding. The Life Cycle Management is implemented using the RegRep 4.0 LCM Manager Interface Specification SubmitObjects Protocol using  eDelivery for secure and reliable messaging. 

In the following sections, a detailed analysis of the internal data model, the Service API specification and the Life Cycle Management specification are provided.