Single-Step and Two-Step Siebel Repository Upgrades
Prior to Siebel CRM version 8.1.1, two Siebel repositories supported Siebel applications: Siebel Business Applications (SEA) repository and Siebel Industry Applications (SIA) repository. The Siebel Industry Applications (SIA) data model is physically a superset of the Siebel Enterprise Application (SEA) data model. The SIA data model has more tables, more columns in the same tables, and more indexes than the SEA data model, but it does not exclude any tables, columns or indexes from the SEA version. Deploying applications from outside either group was not possible through a direct, single-step upgrade process.
Since Siebel CRM version 8.1.1, only the SIA repository is supported. On z/OS, an upgrade process enabling a direct, single-step upgrade from SEA to SIA repositories is available only from 8.1.1.x releases. Upgrades from Siebel CRM 7.5.3 (SEA) through Siebel CRM version 8.0 (SEA) require a two-step upgrade process. For additional information, see the topic about Siebel Repositories in Siebel Database Upgrade Guide.