Update specification.asciidoc
Update specification.asciidoc
gitenberg-dev/HTMLBook,oreillymedia/HTMLBook,gitenberg-dev/HTMLBook,macmillanpublishers/HTMLBook,mushroomgithub/HTMLBook,mushroomgithub/HTMLBook,mushroomgithub/HTMLBook,gitenberg-dev/HTMLBook,oreillymedia/HTMLBook,macmillanpublishers/HTMLBook,macmillanpublishers/HTMLBook,wastemobile/HTMLBook,wastemobile/HTMLBook,oreillymedia/HTMLBook