@knowprose @evan@cosocial.ca i meant more like, for example, whatever follows the @ sign is entirely arbitrary in content and in mapping. i could "@evan" and it wouldn't be immediately clear what "@" means or what "evan" refers to. the same general function of a "mention" was denoted with a "+" on google+. there is also no clear standard on when to terminate such a "mention". can it include spaces or not? on twitter no, on google+ yes. and so on and so forth.