What is a special kind of relational database that manages data from many sources for multiple users across multiple locations?

The correct choice highlights a Clinical Data Repository (CDR), which is specifically designed to aggregate and manage data from a variety of sources, providing a centralized database that can support multiple users accessing information across different locations. A CDR integrates diverse data sets, improving the efficiency of healthcare data management and enabling better decision-making by offering a holistic view of patient information. It permits the combination of data from various sources, such as electronic health records, lab systems, and other health information systems, facilitating a comprehensive approach to patient care and data analysis.

In contrast, the other options refer to different concepts. A Clinical Document Architecture (CDA) focuses on the structure and semantics of clinical documents for sharing. An Electronic Health Record (EHR) system holds patient-specific information but typically serves a more singular or localized purpose rather than managing data across numerous sources and locations. Service-Oriented Architecture (SOA) relates to software architecture design principles but does not specifically address the management of healthcare data like a CDR does.