In E-Sourcing 5.1 clauses, legacy contracts and agreements were searchable from the main workbench using search technology enable by the KM Portal usage type and the TREX 7.1 search engine. Though this technology will remain available for the release of SAP Sourcing 7 TCO can be reduced by using the Global search capability of the newly supported Oracle 11 and DB2 9.7 databases. Should you have the existing KM & TREX infrastructure or not wish to upgrade to a more recent DB version then you still have the option to continue using KM & TREX.