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<h3 id="section4.4">4.4 Other Technical Considerations</h3>
<h4 id="section4.4.1">4.4.1 Encoding</h4>
All data in ATDIS requests should be encoded using UTF-8, and all data returned by ATDIS-compatible systems should be returned in UTF-8 encoding. See [http://en.wikipedia.org/wiki/UTF-8](http://en.wikipedia.org/wiki/UTF-8) for details.