Companies with systems set up for business data exchange will probably have fewer changes in business processes than those starting from scratch. ebXML builds on the lessons learned from EDI, particularly the need to identify trading partners and messages and account for all message traffic. The best practices established for effective EDI apply to ebXML. ebXML also identifies common data objects, called core components, that allow companies to interchange standard EDI data with XML vocabularies compliant with the ebXML specifications.