The Link element describes a link to an element that was assigned
a unique identifier. The text contents of the
Link
element are used as the
anchor text
when generating hyperlinks in rendered documents.
The Link element is subject to integrity checking; documents that declare links to
nonexistent elements will fail validation and renderers will refuse to process them.
The LinkExternal element describes a link to an external resource such as a web site.
The text contents of the LinkExternal element are used as the
anchor text
when generating hyperlinks in rendered documents.
Footnote links are expected to be rendered in the traditional style. That is, a link to a footnote
is rendered as the number of the footnote enclosed in square brackets.