This data taxonomy represents a self-consistent database of terms used with in the Network of Models schema. It allows for a uniform representation of model inputs and outputs.

Physical quantites are the lowest level fundamental quantites with a detail and specific meaning across the wide range of engineering scientific disciplines.

Derived values are named quantities that represent a physical trait or measurement. They are typically of a particular physical quantity, e.g. altitude is a derived value (not a physical quantity) and has units of length (a physical quantity). Equally, thickness has the same phsical quantity (i.e. length) but is provided as a derived value as to distiguish betweeen these very different (conceptually) quantities that are both a type of length.

Composite data types are groups of derived values or physical quantities that form a well defined type of model input or output. They are specified by the columns of data expected to for such data.

• Composite data
• Derived variables
• Physical quantities
• Qualifiers