Link to an external file or resource.
Complete URLS should be tagged with <uri>. Incomplete URLs, e.g., missing http:// and therefore not valid, should be tagged with <ext-link>.
Any combination of:
<address>, <aff>, <array>, <article-title>, <attrib>, <bold>, <chapter-title>, <chem-struct>, <chem-struct-wrap>, <collab>, <comment>, <compl>, <contrib>, <contrib-group>, <copyright-statement>, <def-head>, <disp-formula>, <disp-formula-group>, <element-citation>, <fig>, <fig-group>, <full>, <graphic>, <inline-supplementary-material>, <intro>, <italic>, <license-p>, <main>, <media>, <meta-value>, <mixed-citation>, <monospace>, <named-content>, <overline>, <p>, <part-title>, <preformat>, <publisher-loc>, <related-article>, <related-object>, <roman>, <sans-serif>, <sc>, <source>, <strike>, <styled-content>, <sub>, <subtitle>, <sup>, <supplementary-material>, <table-wrap>, <table-wrap-group>, <td>, <term>, <term-head>, <th>, <title>, <trans-source>, <trans-title>, <underline>
...
<p>Requests for official interpretations of any aspect of this
part of ISO 857 should be directed to the Secretariat of
ISO/TC 44/SC 7 via your national standards body. A complete
listing of these bodies can be found at <ext-link ext-link-type="uri"
xlink:href="http://www.iso.org">www.iso.org</ext-link>.</p>
...
JATS-common0.ent