tion and set subtraction operators (+ and binary -)
<li>Low-precedence union operator (|)
</ol>


<p>For a clear understanding of how category
	selection works, review the documentation for both the
	<a href="category.html">Category Attribute</a> and the
	<a href="explicit.html">Explicit Attribute</a>.</p>
<h4>Redirecting Output</h4>
<p>The output that is normally shown on the console may be redirected to a file.
	This includes output created by the test program as well as what NUnit itself
	creates. The fo