[mattmanser]

Many moons ago I worked somewhere that used XPath extensively.

Definitely a serious learning curve, some of the developers really struggled with it, others went crazy on it.

I made a pivot table maker with it. It was crazy fast vs the js version I originally tried back in the pre-v8 engine days. The js version would basically die after you got past a trivial amount of data, the xlst one was instant regardless of the amount of data.