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copied!<p>Technically YAML is a superset of JSON. This means that, in theory at least, a YAML parser can understand JSON, but not necessarily the other way around. </p> <p>See the official specs, in the section entitled <a href="http://yaml.org/spec/1.2/spec.html#id2759572" rel="noreferrer">"YAML: Relation to JSON"</a>.</p> <p>In general, there are certain things I like about YAML that are not available in JSON. </p> <ul> <li>As <a href="https://stackoverflow.com/a/1726816/1218980">@jdupont pointed out</a>, YAML is visually easier to look at. In fact the <a href="http://yaml.org/" rel="noreferrer">YAML homepage</a> is itself valid YAML, yet it is easy for a human to read. </li> <li>YAML has the ability to reference other items within a YAML file using "anchors." Thus it can handle relational information as one might find in a MySQL database. </li> <li>YAML is more robust about embedding other serialization formats such as JSON or XML <em>within</em> a YAML file. </li> </ul> <p>In practice neither of these last two points will likely matter for things that you or I do, but in the long term, I think YAML will be a more robust and viable data serialization format. </p> <p>Right now, AJAX and other web technologies tend to use JSON. YAML is currently being used more for offline data processes. For example, it is included by default in the C-based OpenCV computer vision package, whereas JSON is not. </p> <p>You will find C libraries for both JSON and YAML. YAML's libraries tend to be newer, but I have had no trouble with them in the past. See for example <a href="http://code.google.com/p/yaml-cpp/" rel="noreferrer">Yaml-cpp</a>. </p>

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