ISO 18443:2016

ISO 18443:2016 Practice defines extensions to the SLE API in terms of:
a)    the RCF-specific functionality provided by API components;
b)    the RCF-specific interfaces provided by API components; and
c)    the externally visible behavior associated with the RCF interfaces exported by the components.
It does not specify:
a)    individual implementations or products;
b)    the internal design of the components; and
c)    the technology used for communications.
ISO 18443:2016 defines only interfaces and behavior that must be provided by implementations supporting the Return Channel Frames service in addition to the specification in reference [3].