Well, that's why you'd use a <link> tag instead of a <a> tag. Link tags in the head are information about the whole document. Anchor tags are more vague in th

Well, that's why you'd use a <link> tag instead of a <a> tag. Link tags in the head are information about the whole document. Anchor tags are more vague in their semantics, and in the context of an hAtom item, <a rel="bookmark"> would be the link to the canonical URL for that item. For a document, <link rel="bookmark"> would be the canonical URL for that document. As in, "If you are looking to save or bookmark this document's URL, you should do it using this URL over here."