|Type specification completeness is a necessary prerequisite for support
of object creating formulae in object calculus leading to formation of
new types to be integrated into a type lattice containing the types from
which they were formed.
The paper shows what conditions should be satisfied in order that the
inferred types could be correct and what is the systematic way of integration
of these types into the existing type lattice on the basis of a well-defined
subtype relation. Ignoring of the specification completeness for type inference
may lead to inconsistent results.
The paper contributes to clarification of type inferencing operations
for the case of complete type specifications.