The World and IfSQ
Extreme Programming and IfSQ

Extreme Programming (XP) is a software development methodology which is intended to improve software quality and responsiveness to changing customer requirements. As a type of agile software development, it advocates frequent "releases" in short development cycles (timeboxing), which is intended to improve productivity and introduce checkpoints where new customer requirements can be adopted.
—From Wikipedia, the free encyclopedia (June 2010)

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Relationship between Extreme Programming and IfSQ:
Clean code is a pre-requisite for success in agile projects. IfSQ has produced and published standards which can be deployed in agile projects.