[msie]

What of the ISO standard that mRuby is based on?

http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_...

Aw crap, I have to buy this doc to see it?

[cremno]

The final draft is available: https://www.ipa.go.jp/osc/english/ruby/

But the ISO document is mostly irrelevant, if we talk about Ruby implementations like CRuby, JRuby, or Rubinius.