<p>You apparently are identifying a very nested topic. I have read about either well-or ill-defined other uses:  <a href="https://stats.stackexchange.com/questions/tagged/nested-anova" class="post-tag" title="show questions tagged &#39;nested-anova&#39;" rel="tag">nested-anova</a>, <a href="https://stats.stackexchange.com/questions/tagged/nested-ancova" class="post-tag" title="show questions tagged &#39;nested-ancova&#39;" rel="tag">nested-ancova</a> (nested analysis of variance or covariance with nested nominal variables), <a href="https://stats.stackexchange.com/questions/tagged/nested-data" class="post-tag" title="show questions tagged &#39;nested-data&#39;" rel="tag">nested-data</a> (of which hierarchically structured data are a subclass), <a href="https://stats.stackexchange.com/questions/tagged/nested-sampling" class="post-tag" title="show questions tagged &#39;nested-sampling&#39;" rel="tag">nested-sampling</a>.</p>

<p>So it definitely makes sense. Could this process lead to the need of a tag ontology?</p>

<p>REM: <a href="https://stats.stackexchange.com/questions/4717/what-is-the-difference-between-a-nested-and-a-non-nested-model">What is the difference between a “nested” and a “non-nested” model?</a></p>

<p>References:</p>

<ul>
<li><a href="http://www.mrao.cam.ac.uk/~steve/maxent2009/images/skilling.pdf" rel="nofollow noreferrer">Nested Sampling for General Bayesian Computation</a>, Skilling, 2006</li>
</ul>
