Quote of the day - Kent Beck on defining XP

From Kent Beck on the XP yahoo group (emphasis mine):

XP is not defined by its practices. It is about values, out of which flow principles, out of which flow practices. Enough of software development is similar enough that, even in different circumstances, the practices derived from the same values and principles end up looking similar. Different values, different principles and you end up with different practices. They might still produce valuable software, but they wouldn't be XP.