The refInfo API has one data type -
refInfo - which
contains information about a given link/reference. Like the MIME API
data types (here), it is a memory-only object that can
only be used in Vortex, not stored externally in SQL tables. Thus all
the MIME API data type caveats apply - e.g. there are no "close"
functions: an object is closed when the last variable reference to it
is cleared (or its frame destroyed).