XSD - The <schema> Element
The <schema> element is the root element of every XML Schema.
The <schema> Element
The <schema> element is the root element of every XML Schema:
<?xml version="1.0"?>
<xs:schema>...
...
</xs:schema> The <schema> element may contain some attributes. A schema declaration often looks something like this:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="https://www.w3schools.com"
xmlns="https://www.w3schools.com"
elementFormDefault="qualified">
...
...
</xs:schema>
The following fragment:
xmlns:xs="http://www.w3.org/2001/XMLSchema"
indicates that the elements and data types used in the schema come from the "http://www.w3.org/2001/XMLSchema" namespace. It also specifies that the elements and data types that come from the "http://www.w3.org/2001/XMLSchema" namespace should be prefixed with
xs:This fragment:
targetNamespace="https://www.w3schools.com"
indicates that the elements defined by this schema (note, to, from, heading, body.) come from the "https://www.w3schools.com" namespace.
This fragment:
xmlns="https://www.w3schools.com"
indicates that the default namespace is "https://www.w3schools.com".
This fragment:
elementFormDefault="qualified"
indicates that any elements used by the XML instance document which were declared in this schema must be namespace qualified.
