prolog:url_expansion

prolog:url_expansion_hook(+Term, -HREF, -Label) is semidet[multifile, pldoc(doc_wiki)]: This hook is called after recognising <Alias:Rest>, where Term is of the form Alias(Rest). If it succeeds, it must bind HREF to an atom or string representing the link target and Label to an html//1 expression for the label.