From Earth Science Information Partners (ESIP)

Love the pattern expression idea, but... -- Clynnes 14:04, 15 May 2012 (MDT)

I love the pattern expression idea, but there is a lot of variation amongst languages as to exactly which regex components are supported. See the table at:

So, we should standardize on which flavor as well. Perhaps the same as what HTML 5 is using? (What are they using?)