="fu"><a href="https://rdrr.io/r/base/sprintf.html">sprintf</a></span><span class="op">(</span><span class="st">"urn:uuid:%s"</span>, <span class="fu"><a href="https://rdrr.io/pkg/uuid/man/UUIDgenerate.html">UUIDgenerate</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span>
<span class="va">testdf</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html">data.frame</a></span><span class="op">(</span>x<span class="op">=</span><span 