KentBeck introduced the XP principles in his ExtremeProgrammingExplainedEmbraceChange to help measure whether or not an adaptation to an ExtremeProgrammingPractice is supporting the four ExtremeProgrammingValues.
The rest below is kept for historical purposesThe hypothetical ProcessPrinciples that underlie XP's practices. With knowledge of the XP principles, we could scale XP to problems for which it wasn't designed.
Possibilities:
An interesting idea. But maybe there are two sets of principles involved here.
There is only one core principle underlying Extreme Programming that I can see: