Facebook Code Book - Free ebook download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or view presentation slides online. FBML Language forYou have probably never heard of FBML, but if you're on Facebook you've definitely seen under your logo/avatar, and find the “Applications” section. This study examines the use of Facebook Markup Language (FBML) to design an e-learning model to facilitate teaching and learning in an academic setting.