CDISC- Gloss – A protocol designed to enable multiple substudies, which may have different objectives and involve coordinated efforts to evaluate one or more investigational drugs in one or more disease subtypes within the overall trial structure. NOTE: The term “master protocol” is often used to describe the design of such trials, with terms such as “umbrella”, “basket”, or “platform” describing specific designs. [After US FDA, Master Protocols: Efficient Clinical Trial Design Strategies to Expedite Development of Oncology Drugs and Biologics Guidance for Industry, 2022] See also umbrella trial design, basket trial design, platform trial design, adaptive design.