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2. Quick Start > The Flesh on an HTML or XHTML Document

The Flesh on an HTML or XHTML Document

Except for the <html>, <head>, <body>, and <title> tags, the HTML and XHTML standards have few other required structural elements. You’re free to include pretty much anything else in the contents of your document. (The web surfers among you know that authors have taken full advantage of that freedom, too.) Perhaps surprisingly, though, there are only three main types of HTML/XHTML content: tags (which we described previously), comments, and text.

Comments

A raw document with all its embedded tags can quickly become nearly unreadable, like computer-programming source code. We strongly recommend that you use comments to guide your composing eye.

Although it’s part of your document, nothing in a comment, which goes between the special starting tag <!-- and ending tag --> comment delimiters, gets included in the browser display of your document. You see a comment in the source, as in our simple HTML example, but you don’t see it on the display, as evidenced by our comment’s absence in Figure 2-1. Anyone can download the source text of your documents and read the comments, though, so be careful what you write. [Section 3.5.3]


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