Wrapper element for one or more authors, editors, translators, etc., that are named in a cited reference
This element is very similar to the <contrib-group> element in the metadata for books and book components. It would have been nice to design the NCBI Book DTD and NCBI Collection DTDs in such a way that there was just one element that could be used inside both the metadata and inside a citation. But using the same name for both elements was not possible, since the content of the two elements is different, and these are DTDs, not schemas. (Note: Some schema languages could accommodate such context-related model differences.)
<!ELEMENT person-group %person-group-model; >
Any combination of:
<citation> Citation; <related-article> Related Article Information; <related-object> Related Object Information
...<ref-list>
<title>References</title>
<ref id="bid.41">
<label>1</label>
<citation>
<person-group>
<name><surname>Olson</surname><given-names>M</given-names></name>
...
</person-group>
<article-title>A common language for physical mapping
of the human genome</article-title>
<source>Science</source>
<year>1989</year>
<volume>245</volume>
<issue>4925</issue>
<fpage>1434</fpage>
<lpage>1435</lpage>
<pub-id pub-id-type="pmid">2781285</pub-id>
</citation>
</ref>
</ref-list>...
references.ent