An XSD that describe a contact information about a company is given below.
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://NamespaceTest.com/CommonTypes"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<xs:element name="contact">
<xs:complexType>
<xs:sequence>
<xs:element name="name" type="xs:string" />
<xs:element name="company" type="xs:string" />
<xs:element name="phone" type="xs:int" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
In the above example the attributes in second line
<xs:schema targetNamespace="http://NamespaceTest.com/CommonTypes" xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
Attributes 'targetnamespace' and elementFormDefault are optional.