The DCMI RDF-AP aims at defining best practices for documenting application profiles, requests for handling RDF application profiles, and for RDF constraints specification and validation. The first deliverable, Report on Use Cases, reports on the case studies collected in the Task Force, their use cases and their validation requirements. The second deliverable, Report on Validation Requirements, supplements the Report on Use Cases from which the requirements were derived. The full descriptions of case studies and use cases can be found in the task group wiki. Case studies and the corresponding use cases are collected in the DCMI RDF-AP database (see DCMI RDF Application Profiles database on case studies, use cases, requirements, and solutions).