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We provide explicit partial differential equations - in finite cases - andfunctional differential equations - in field-theoretic cases - which determineobservables or beables in the senses of Kucha\v{r} and of Dirac. These cover awide range of relational mechanics models as well as Electromagnetism,Yang--Mills Theory and General Relativity. We give an underlying reason whypure-configuration Kucha\v{r} observables are already well-known: various typesof shape, E-fields, B-fields, loops and 3-geometries. The partial differentialequations or functional differential equations for pure-momentum observablesare also posed, as are those for observables which have a mixture ofconfiguration and momentum functional dependence.

Explicit partial and functional differential equations for beables or observables