# U10 Thermodynamic Data Classes **Domain:** Continuity Modeling / Thermodynamics **Doc Type:** Research-Frontier Model Node **Maturity:** Conceptual Modeling **Related:** [[U3 Molecular Data Classes]], [[Time Asymmetry]], [[Information Theory]] --- ## Definition **U10 thermodynamic data classes** are continuity-modeling categories described in the source article for entropy flow, temporal asymmetry, and physical constraints on a biological or emulated system. They make explicit that a living neural process is not only a graph but an energy-consuming, history-dependent dynamical system. ## Evidentiary boundary U10 is a theoretical modeling layer rather than a codified neuroinformatics standard. It marks variables that a purely structural snapshot may fail to retain.