Teste qual dos dois hemisférios de seu cérebro você usa mais. HTML 5 Reference. It is useful to make a distinction between the vocabulary of an HTML document—the elements and attributes, and their meanings—and the syntax in which it is written.
HTML has a defined set of elements and attributes which can be used in a document; each designed for a specific purpose with their own meaning. Consider this set of elements to be analogous to the list of words in a dictionary. Drag & Drop Rich Internet Application Development.