Yes. They are not presentational elements —
blockquote represents a block quotation,
q represents an inline quotation, and
cite represents a reference to a name, work, standard, URL, etc.
You do have some validation errors that are fairly common with blockquote. A blockquote element cannot be inside a paragraph, and in HTML4 actually needs to contain paragraphs. The nesting of the
blockquote elements in your fragment needs to be reversed.
blockquote element (also the
q element) can optionally have a
cite attribute to specify a URI where the quote came from. HTML5 says user agents should make that link available to the user, and HTML4 doesn't say anything at all. I would include the URI both in the
cite attribute and as an inline link, since browsers don't handle it.
Here's how I would write that fragment, with those revisions in mind:
<blockquote cite="http://stackoverflow.com"> <p>Type HTML in the textarea above, <q>and it will magically appear</q> in the frame below.</p> </blockquote> <p> <cite><a href="http://stackoverflow.com">reference url</a></cite> </p>