Alcance
                            ISO 18442:2016 defines extensions to the SLE API in terms of:a)    the RAF-specific functionality provided by API components;b)    the RAF-specific interfaces provided by API components; andc)    the externally visible behavior associated with the RAF interfaces exported by the components.It does not specifya)    individual implementations or products;b)    the internal design of the components; andc)    the technology used for communications.ISO 18442:2016 defines only interfaces and behavior that must be provided by implementations supporting the Return All Frames service in addition to the specification in reference [3].