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<!DOCTYPE HTML>
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Writing a data format
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<h1>
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<a href="." >Writing a data format</a>
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<h1 id="writing-a-data-format"><a name="writing-a-data-format" class="plugin-anchor" href="#writing-a-data-format"><i class="fa fa-link" aria-hidden="true"></i></a>Writing a data format</h1>
<p>The most important thing to understand before writing a data format is that
<strong>Serde is not a parsing library</strong>. Nothing in Serde is going to help you parse
whatever format you are implementing. The role of Serde is very specific:</p>
<ul>
<li><strong>Serialization</strong> — taking arbitrary data structures from the user and
rendering them in the format with maximum efficiency.</li>
<li><strong>Deserialization</strong> — interpreting the data that you parse into data
structures of the user's choice with maximum efficiency.</li>
</ul>
<p>Parsing is neither of these things and you will either be writing parsing code
from scratch or using a parsing library to implement your Deserializer.</p>
<p>The second most important thing to understand is the <a href="data-model.html"><strong>Serde data model</strong></a>.</p>
<p>The following pages walk through a basic but functional JSON serializer and
deserializer implemented using Serde.</p>
<ul>
<li><a href="conventions.html">Conventions for what to export at the root of the crate</a></li>
<li><a href="error-handling.html">Serde error traits and error handling</a></li>
<li><a href="impl-serializer.html">Implementing a Serializer</a></li>
<li><a href="impl-deserializer.html">Implementing a Deserializer</a></li>
</ul>
<p>You can find these four source files all together as a buildable crate in <a href="https://github.com/serde-rs/example-format" target="_blank">this
GitHub repository</a>.</p>
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