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== As simple content models==



<source lang="xml">
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
elementFormDefault="qualified">
<xs:simpleType name="empty">
<xs:restriction base="xs:string">
<xs:enumeration value="" />
</xs:restriction>
</xs:simpleType>
<xs:element name="br">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="empty">
<xs:attribute name="id" type="xs:ID" />
<xs:attribute name="class" type="xs:NMTOKEN" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:schema></source>

== Creating Elements with Simple Content and Attributes==



<source lang="xml">
When declaring an element that has simple content, you start with a basic element declaration:
<element name="phone">

</element>
Within the element declaration, you include a <complexType> declaration in which you specify that you want your element to have simple content.
You do this by creating a <complexType> declaration that contains a <simpleContent> element.
The <simpleContent> element indicates that the <complexType> cannot contain child elements.
It may contain attributes, but otherwise the content will be defined by a simple type.
<element name="phone">
<complexType>
<simpleContent>

</simpleContent>
</complexType>
</element>
Within the <simpleContent> element, you can create an <extension> declaration.
You must use an <extension> declaration because you will be extending an existing data type by adding attribute declarations.
<element name="phone">
<complexType>
<simpleContent>
<extension base="string">
<attribute name="kind" type="string" default="Home" />
</extension>
</simpleContent>
</complexType>
</element>

Any of the following examples are allowable <phone>elements based on the previous declaration:
<phone kind="Home">001-909-555-1212</phone>
<phone>001-909-555-1212</phone>
<phone /></source>

== Defining Elements to Contain Only Text==



<source lang="xml">
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
elementFormDefault="qualified">

<xsd:complexType name="popType">
<xsd:simpleContent>
<xsd:extension base="xsd:integer">
<xsd:attribute name="year" type="xsd:integer" />
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:element name="population" type="popType" />
</xsd:schema>

File: Data.xml

<population xmlns="http://www.wbex.ru" year="1999">445</population></source>

== element based on simple type==



<source lang="xml">
File: Data.xml
<?xml version="1.0"?>
<INVENTORY>
<BOOK InStock="true">
<TITLE>title 1</TITLE>
<AUTHOR Born="1835">
<FIRSTNAME>Mark</FIRSTNAME>
<LASTNAME>Twain</LASTNAME>
</AUTHOR>
<BINDING>hardcover</BINDING>
<PAGES FrontMatter="8">298</PAGES>
<PRICE>5.49</PRICE>
<DATE>2000-03</DATE>
<ISBN>9-9999-9999-9</ISBN>
</BOOK>
</INVENTORY>

File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="INVENTORY">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="BOOK" type="BookType"
minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:complexType name="BookType">
<xsd:sequence>
<xsd:element name="TITLE">
<xsd:complexType mixed="true">
<xsd:sequence>
<xsd:element name="SUBTITLE" type="xsd:string"
minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="AUTHOR">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="FIRSTNAME" type="xsd:string"/>
<xsd:element name="LASTNAME" type="xsd:string"/>
</xsd:sequence>
<xsd:attribute name="Born" type="xsd:gYear"/>
</xsd:complexType>
</xsd:element>
<xsd:element name="BINDING">
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:enumeration value="hardcover"/>
<xsd:enumeration value="mass market paperback"/>
<xsd:enumeration value="trade paperback"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
<xsd:element name="PAGES">
<xsd:complexType>
<xsd:simpleContent>
<xsd:extension base="xsd:positiveInteger">
<xsd:attribute name="FrontMatter"
type="xsd:positiveInteger"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
</xsd:element>
<xsd:element name="PRICE">
<xsd:simpleType>
<xsd:restriction base="xsd:decimal">
<xsd:minExclusive value="0"/>
<xsd:maxExclusive value="100"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
<xsd:element name="DATE" type="xsd:gYearMonth" minOccurs="0"/>
<xsd:element name="ISBN">
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:pattern value="\d{1}-\d{4}-\d{4}-\d{1}"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
</xsd:sequence>
<xsd:attribute name="InStock" type="xsd:boolean" use="required" />
</xsd:complexType>
</xsd:schema></source>

== The simpleContent element is used if the complex type may only have text content==



<source lang="xml">
The difference between this and a simple type is that it may carry one or more attributes.
The only children that are permitted for this element are the restriction and extension elements.
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
elementFormDefault="qualified">
<xs:element name="Person">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="age" type="xs:integer" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:schema></source>

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