2>Overview</h2>
<p>This vignette shows an overview of known data types and their
abbreviations, and their origin. For example, <code>&lt;int&gt;</code>
in the header of a column indicates an integer column, and
<code>&lt;chr&gt;</code> denotes a character column.</p>
<table>
<colgroup>
<col width="29%" />
<col width="21%" />
<col width="34%" />
<col width="14%" />
</colgroup>
<thead>
<tr class="header">
<th align="left">Class</th>
<th align="left">Data type</th>
<th align="left">Example</th>
<th align="left