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# XSD - Element * * * The `` element is the root element of every XML Schema. * * * ## `` Element The `` element is the root element of every XML Schema: ... ... The `` element can contain attributes. A typical schema declaration looks like this: ... ... The following code snippet: xmlns:xs="http://www.w3.org/2001/XMLSchema" indicates that the elements and data types used in the schema come from the namespace "http://www.w3.org/2001/XMLSchema". It also specifies that elements and data types from the namespace "http://www.w3.org/2001/XMLSchema" should use the prefix xs: This fragment: targetNamespace="" indicates that the elements defined by this schema (note, to, from, heading, body) belong to the namespace "". This fragment: xmlns="" indicates that the default namespace is "". This fragment: elementFormDefault="qualified" indicates that any elements declared in this schema and used in an XML instance document must be namespace-qualified.