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    <p>Attribute selectors are a very flexible way to manage styles for large-scale CSS because the attribute selectors will always have a <a href="http://www.w3.org/TR/css3-selectors/#specificity">specificity of <code>0-0-1-0</code></a>.</p> <p><code>[aria-*]</code> selectors are perfectly fine to use as styling hooks, and I also recommend using custom <code>[data-*]</code> attributes to fill in the gaps where you might need a one-off. Certainly class selectors should continue to be used, however you can do some very elegant style extensions with attribute selectors:</p> <pre><code>[data-foo] { color: red; } [data-foo="bar"] { color: blue; } [data-foo="fizz"] { color: green; } </code></pre> <p>Each of these selectors has the same specificity, and the cascade will allow the styles to be applied appropriately.</p> <p>You could create your own form of classes by using the <code>[attr~="value"]</code> selector if need be.</p> <p>Using the <a href="http://www.w3.org/TR/css3-selectors/#attribute-substrings">"attribute contains" selector</a> can be useful for <a href="http://zzzzbov.com/blag/classy-images-in-markdown">a technique that I call "classy images"</a></p> <hr> <p>One of the hidden benefits to using attributes over classes is a performance gain in JavaScript. Instead of having to check for the presence of a class on an element (which is remarkably easy to get wrong), browsers have supported <code>getAttribute</code>, <code>hasAttribute</code>, and <code>setAttribute</code> for a long time.</p>
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    1. POAre there reasons not to use ARIA states and roles as selectors in CSS?
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    1. COI hadn't thought about the JS performance implications, good point.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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