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Keywords are contained in <keywordset>s, and there may be several sets of keywords, each of which can be identified separately by vocabulary source or function.
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<article xmlns="http://docbook.org/ns/docbook" version="5.0-subset Balisage-1.1"
xml:id="HR-23632987-8973">
<title>Raleigh's Discoveries in the New World</title>
<info>
<confgroup>
<conftitle>Balisage: The Markup Conference</conftitle>
<confdates>12 - 15 August 2008</confdates>
</confgroup>
<abstract>
<para>In 1584, Queen Elizabeth I charged Sir Walter Raleigh to discover and
colonize lands ...</para>
</abstract>
<author>
<personname><firstname>Tonia</firstname>
<othername>Renae</othername>
<surname>Gaillard</surname></personname>
<personblurb>
<para>A native of Lexington, Dr. Gaillard completed her post-graduate studies
in Colonial American History in 1982 ...</para>
...
</personblurb>
<affiliation><jobtitle>Department Chair</jobtitle>
<orgname>University of Kentucky</orgname></affiliation>
<email>tgaillard@uky.hist.edu</email>
</author>
<legalnotice>
<para>Copyright © 2008 Tonia Renae Gaillard. Used by permission.</para>
</legalnotice>
<keywordset role="author">
<keyword>New World discoveries</keyword>
<keyword>American colonial history</keyword>
<keyword>English 16th century history</keyword>
</keywordset>
</info>
<section>...</section>
...
</article>
balisage-1-1