JD_Toims - 10:58 am on Dec 15, 2013 (gmt 0)
But I was able to make an interpretation, specifically that you are probably allowed to put almost any kind of contact information inside the <address> element, even links to other websites.
Yes, you're correct, as long as the contact information presented is pertaining to the corresponding article or the body as a whole and not simply an address of say a business listing of the page or a directory -- IOW: A site like YellowPages.com would use <p> and likely schema.org to markup for the businesses they list but would reserve the <address> use for information relating to contacting YellowPages.com.
What swa66 said above is absolutely fine according to the w3.org docs and even according to the examples presented on the whatwg.org site -- And, since there is also at least one link in each of the examples, if the contact information was related externally somehow, say to something like an externally hosted bio of the author or externally hosted extended contact details for the author/site-owner or something along those lines, I'm sure that link would be fine to include too.
<p>The contact email address is shown below. Please use it to make comments and suggestions, or to report broken links.</p>
<img src="mail.gif" alt="email">
<p>Copyright © 2013 John Doe</p>
w3.org and whatwg.org examples -- Emphasis Added
For example, a page at the W3C Web site related to HTML might include the following contact information:
<A href="../People/Raggett/">Dave Raggett</A>,
<A href="../People/Arnaud/">Arnaud Le Hors</A>,
contact persons for the <A href="Activity">W3C HTML Activity</A>
In this example the footer contains contact information and a copyright notice.
For more details, contact
<a href="mailto:firstname.lastname@example.org">John Smith</a>.
<p><small>© copyright 2038 Example Corp.</small></p>