Siebel Component Assembly features a schema that is available as objects, so it is not tightly connected to Siebel's own schema. Major elements of Siebel Component Assembly include: Foundation Workbench, offering a repository and editor for building declarative, metadata components; and Siebel Component Sets, featuring prebuilt components for Foundation, Sales, Services, B2B and B2C systems.

Component descriptions in Foundation Workbench are stored as XML files; the workbench can import and export code-based services to and from common development environments such as Eclipse and Microsoft Visual Studio. These services can be run on .Net or J2EE systems.