The Tools Layer is made up of a consistent set of APIs, a unified object and programming model, and some readymade components. This layer enables development of clients and server-side components that work with the content repository.
Among Design/Development components, Composer is the development tool while others are features used for development.
Documentum Composer, an Eclipse-based integrated development environment (IDE), is the primary tool for developing, deploying, and configuring applications running on the Documentum platform. Composer is discussed in detail in Chapter 10, Documentum Projects.
Documentum Foundation ...