  Confluence is a critical property of computational systems which is related
with determinism and non ambiguity and thus with other relevant computational
attributes of functional specifications and rewriting system as termination and
completion. Several criteria have been explored that guarantee confluence and
their formalisations provide further interesting information. This work
discusses topics and presents personal positions and views related with the
formalisation of confluence properties in the Prototype Verification System PVS
developed at our research group.
