xsd xs:complexType Creating a global xs:complexType by extending an existing xs:complexType

Example

In this example we are creating a new xs:complexType (EmployeeType) based on an existing xs:complexType (PersonType).

The construction of this is slightly more complicated. Because the base xs:complexType (PersonType) is considered to be complex (more about this below) we add the <xs:complexContent> element. Then because we are extending PersonType, we add the element <xs:extension base="PersonType">. Within the xs:extension tag we can add a compositor (xs:all/xs:choice/xs:sequence) and any additional attributes.

<?xml version="1.0" encoding="utf-8" ?>
<!--Created with Liquid Studio 2017 (https://www.liquid-technologies.com)-->
<xs:schema elementFormDefault="qualified" 
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:complexType name="PersonType">
        <xs:sequence>
            <xs:element name="Forename" type="xs:string" />
            <xs:element name="Surname" type="xs:string" />
        </xs:sequence>
        <xs:attribute name="Gender">
            <xs:simpleType>
                <xs:restriction base="xs:string">
                    <xs:enumeration value="male" />
                    <xs:enumeration value="female" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
    </xs:complexType>
    <xs:complexType name="EmployeeType">
        <xs:complexContent>
            <xs:extension base="PersonType">
                <xs:sequence>
                    <xs:element name="Salary" type="xs:decimal" />
                </xs:sequence>
                <xs:attribute name="EmployeeID" type="xs:int" use="required" />
            </xs:extension>
        </xs:complexContent>
    </xs:complexType>
</xs:schema>