SlamData’s own flavor of Markdown defines simple form syntax too which also aims at degrading nicely:
name = ____
interests = ________ (SlamData)
year = #________ (1999)
commute = () car (x) bus () bike
phones = [x] iPhone [] Blackberry [x] Android
city = {BOS, SFO, NYC}
date = ____-__-__ (2016-04-19)
time = __:__ (02:30 PM)
start = ____-__-__ __:__ (2016-04-19 14:00)