What are WHO classifications that provide additional detail to reference classifications called?

The correct answer is derived classifications. Derived classifications are additional classifications that build upon reference classifications to provide more granular detail about specific health-related data or conditions. This concept is essential in health informatics because it allows for more precise data coding and analysis in various contexts, such as epidemiology, health services research, and clinical practice. By using derived classifications, healthcare professionals and researchers can obtain more detailed insights from the existing reference classifications, facilitating better decision-making and public health reporting.

Other terms such as reference classifications refer to a base set of coding systems typically used for standardization, while adapted classifications may imply modifications tailored to specific needs but do not necessarily provide additional detail. Standard classifications, while relevant, might not capture the nuanced aspects that derived classifications indicate. The key distinction lies in the additional detail and specificity offered by derived classifications derived from reference systems.