<self-uri> URI for This Same Article Online
URI for another version of a document. This element may be used when the document is available in multiple forms (for example, a printed article and in its expanded version with additional graphics available online).
The textual content of this element may be a URI (typically naming a website) when the text is used as a live link, or the element content may just be a few words and the link attributes hold the real link, for example:
... <self-uri xlink:href="...URL here...">An expanded version of this document is available online</self-uri> ...