An anchor (fixed location) that may be placed anywhere within textual material such as a paragraph to provide a location to which a cross reference can point
(#PCDATA | ext-link | related-article | inline-supplementary-material | break | bold | italic | monospace | overline | roman | sans-serif | sc | strike | underline | alternatives | inline-graphic | mml:math | fn | target | xref | sub | sup)*
Any combination of:
<addr-line>, <aff>, <alt-title>, <article-title>, <attrib>, <award-id>, <bold>, <chem-struct>, <comment>, <copyright-statement>, <corresp>, <def-head>, <disp-formula>, <etal>, <ext-link>, <funding-source>, <funding-statement>, <inline-supplementary-material>, <institution>, <italic>, <kwd>, <license-p>, <mixed-citation>, <monospace>, <named-content>, <on-behalf-of>, <overline>, <p>, <preformat>, <product>, <related-article>, <role>, <roman>, <sans-serif>, <sc>, <series>, <series-text>, <series-title>, <speaker>, <strike>, <string-name>, <styled-content>, <sub>, <subject>, <subtitle>, <sup>, <supplement>, <target>, <td>, <term>, <term-head>, <th>, <title>, <trans-subtitle>, <trans-title>, <underline>, <verse-line>, <xref>
link3.ent