This event occurs whenever the parser reaches the end of the current input buffer. The parser passes (along with the BYVALUE user token) two BYADDR parameters: the address and length of the next buffer for it to process. Note that this and the content character events are the only events that have any BYADDR parameters, but this is the only event that has parameters that the called event should change. There is no corresponding event in the PLIXSAXA and PLISAXB built-in subroutines, and it is this event that allows PLISAXC to parse an XML document of arbitrary size.