Some years back I was occasionally involved with the OTA (Open Travel alliance), and ended up attending a meeting to discuss specs. Along with a largely enterprisey view of XML, I was amazed by the amount of attention given to defining markup to handle golf tee times.

I'd worked in hotels for many years by then, but never at a resort; I first thought they were talking about tea times, which seemed just plain bizarre. But no more bizarre than their love for W3C Schemas.