Designing Your own XML Schema: Restrictions and User Defined Types - User-defined Simple Type with enumeration in XML Schema
(Page 5 of 7 )
In the previous two sections, we dealt with only the simple type without enumeration. Now, we shall deal with user-defined simple types with the enumeration facet.
Let us consider that I would like to define my own data type called “Category,” which holds all types of employee categories (in the form of an enumeration). The following listing of a complete XML Schema does the same:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault=
"unqualified">
<xs:element name="Employees">
<xs:annotation>
<xs:documentation>Contains All Employee information</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="Employee" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="ID" type="xs:string">
</xs:element>
<xs:element name="Name" type="xs:string" />
<xs:element name="EmpCategory" type="Category" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:key name="PK_Employee_ID">
<xs:selector xpath=".//Employee" />
<xs:field xpath="ID" />
</xs:key>
</xs:element>
<xs:simpleType name="Category">
<xs:restriction base="xs:string">
<xs:enumeration value="TopManagement" />
<xs:enumeration value="Management" />
<xs:enumeration value="SalesMan" />
<xs:enumeration value="Clerk" />
</xs:restriction>
</xs:simpleType>
</xs:schema>
I shall explain the above schema in the next section.
Next: Understanding the simple type with enumeration in XML Schema >>
More XML Articles
More By Jagadish Chaterjee
/ 2 
