The Information Flow Framework (IFF) is a descriptive category metatheory

currently under development, which is being offered as the structural aspect

of the Standard Upper Ontology (SUO). The architecture of the IFF is

composed of metalevels, namespaces and meta-ontologies, whose core forms a

metastack representing the set-theoretic notions of the "small", the

"large", the "very large" and the "generic". The main application of the IFF

is institutional: the notion of institutions and their morphisms are being

axiomatized in the upper metalevels of the IFF, and the lower metalevel of

the IFF has axiomatized various institutions (information flow, equational

logic, many sorted first order logic, the common logic standard) in which

semantic integration has a natural expression.