Here Are Some Defenitions An HTML tag consists of text that appears between two angle brackets. A nested tag is a tag that is enclosed inside another set of tags. A tag that requires only an opening tag is called an empty tag. A source code shows the text and HTML elements used to create that page. A file extention tells the computer what type of file it is reading. An attribute is an instruction that further specifies a tag's characteristics. An ordered list displays items that must appear in a particular sequence. An unordered list contains items that can appear in any order. An anchor tag identifies what is clicked in and where the link takes the user. A graphic link is an image a user clicks to activate a hyperlink.