The paper formulates HEQ, an institution for hybrid equational logic to provide a uniform setting to express and reasoning about diferent sorts of properties of complex software. It is also shown how, through the denition of a suitable comorphism to FOL, this can be integrated in Hets, providing suitable tool support for teaching and research. The whole exercise was motivated by the need to unify, in a single under-graduate course in a Computer Science curriculum, the specication of data and behavioural constraints of recongurable systems.