XPP may refer to: Poplar River Airport, the IATA code for the airport in Canada XML Professional Publisher, a standards-based, high performance, content formatting and publishing application XML Pull Parsing, a method of parsing an XML document, StAX parsers are an implementation of a pull parser. eXtreme Processing Platform, a processor architecture XPP-AUT, a tool for solving stochastic, differential, and difference equations, amongst others. X++, the programming language behind Microsoft Dynamics AX