A Simple Document W3C XML Schema

This schema defines the urn:publicid:-:Norman+Walsh:Schema Example:EN namespace by defining several elements and their complex types.

Documents that conform to this schema have the general form:

<doc xmlns="urn:publicid:-:Norman+Walsh:Schema Example:EN">
  <title>Sample Document</title>
  <para>Some paragraphs.</para>
</doc>

The Types

This schema only defines three element types: doc, title, and para.

The doc Type

This is a document.

<xs:complexType name="doc"> <xs:sequence> <xs:element ref="ex:title" minOccurs="0" maxOccurs="1"/> <xs:choice minOccurs="1" maxOccurs="unbounded"> <xs:element ref="ex:para"/> </xs:choice> </xs:sequence> </xs:complexType>

The title Type

This is a title.

<xs:complexType name="title" mixed="true"> <xs:anyAttribute namespace="##other" processContents="lax"/> </xs:complexType>

The para Type

This is a paragraph.

<xs:complexType name="para" mixed="true"> <xs:anyAttribute namespace="##other" processContents="lax"/> </xs:complexType>

The role Attribute

Each of the complex types in this schema allows an optional role attribute. The role attribute is simply a string.

<xs:attribute name="role" type="xs:string"/>

The Elements

This schema defines one element of each complex type.

<xs:element name="doc" type="ex:doc"/> <xs:element name="para" type="ex:para"/> <xs:element name="title" type="ex:title"/>

The Schema

The schema wrapper surrounds all these definitions.

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ex="urn:publicid:-:Norman+Walsh:Schema Example:EN" targetNamespace="urn:publicid:-:Norman+Walsh:Schema Example:EN" elementFormDefault="qualified"> </xs:schema>