The document discusses the Open Group Conference in Rome and the practical application of service-oriented architecture (SOA) in the public procurement processes of the European Commission. It provides an overview of the e-PRIOR interoperability platform, which was implemented to support electronic procurement at the European Commission. The presentation describes how e-PRIOR uses standards and web services to enable interoperability between the Commission's internal systems and external suppliers. It also discusses how e-PRIOR has helped increase efficiency and reduce costs for both the Commission and its suppliers.