Thanks to Eliane Rodrigues de Avila for providing this information.
Remote Diagnostic Agent (RDA) is a command-line-driven data collection framework that can gather product and environmental information to assist in problem diagnosis. Full information on RDA is available in Remote Diagnostic Agent (RDA) – Information Center (DocID 2388643.2)
Improvements in this release include:
This release of RDA is bundled with the 2.12.38 release of the Diagnostic Assistant (DA). The DA tool is a command-line interface framework designed to simplify and standardize the end user’s experience with various diagnostic tools. Providing a common, lightweight extensible interface to multiple collection tools such as Automatic Diagnostic Repository (ADR) and Oracle Configuration Manager (OCM). DA packages can also work with Oracle applications (JDE EnterpriseOne, Siebel, PeopleSoft) as verifiers, providing a basic Java interface to facilitate the user’s data collection.
For information about DA functionality, refer to Diagnostic Assistant: Information Center (Doc ID 201804.2)
For more information on RDA, review these helpful resources: