Editing XML (section)

=== Schema ===
{{Main|XML Schema (W3C)}}

A newer schema language, described by the W3C as the successor of DTDs, is [[XML Schema (W3C)|XML Schema]], often referred to by the [[initialism]] for XML Schema instances, XSD (XML Schema Definition). XSDs are far more powerful than DTDs in describing XML languages. They use a rich [[Data type|datatyping]] system and allow for more detailed constraints on an XML document's logical structure. XSDs also use an XML-based format, which makes it possible to use ordinary XML tools to help process them.

xs:schema element that defines a schema:
<syntaxhighlight lang="xml">
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"></xs:schema>
</syntaxhighlight>