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== Create global complex types==



<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="supportedLanguages">
<xs:restriction base="xs:language">
<xs:enumeration value="en" />
<xs:enumeration value="es" />
</xs:restriction>
</xs:simpleType>

<xs:attribute name="lang" type="supportedLanguages" />
<xs:complexType name="tokenWithLang">
<xs:simpleContent>
<xs:extension base="xs:token">
<xs:attribute ref="lang" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:element name="title" type="tokenWithLang" />
</xs:schema></source>

== Derivation by extension==



<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="supportedLanguages">
<xs:restriction base="xs:language">
<xs:enumeration value="en" />
<xs:enumeration value="es" />
</xs:restriction>
</xs:simpleType>

<xs:attribute name="lang" type="supportedLanguages" />
<xs:complexType name="tokenWithLang">
<xs:simpleContent>
<xs:extension base="xs:token">
<xs:attribute ref="lang" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>

<xs:element name="title">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="tokenWithLang">
<xs:attribute name="note" type="xs:token" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:schema></source>

== Derivation by restriction==



<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:complexType name="tokenWithLangAndNote">
<xs:simpleContent>
<xs:extension base="xs:token">
<xs:attribute name="lang" type="xs:language" />
<xs:attribute name="note" type="xs:token" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:schema></source>

== Derived Datatypes==



<source lang="xml">
Type Name Type Derivation
integer Built-in derived decimal
token Built-in derived normalizedString
nonPositiveInteger Built-in derived integer
long Built-in derived integer
nonNegativeInteger Built-in derived integer
language Built-in derived token
Name Built-in derived token
NMTOKEN Built-in derived token
negativeInteger Built-in derived nonPositiveInteger
int Built-in derived long
unsignedLong Built-in derived nonNegativeInteger
positiveInteger Built-in derived nonNegativeInteger
NCName Built-in derived Name
NMTOKENS Built-in derived NMTOKEN
short Built-in derived int
unsignedInt Built-in derived unsignedLong
ID Built-in derived NCName
IDREF Built-in derived NCName
ENTITY Built-in derived NCName
byte Built-in derived short
unsignedShort Built-in derived unsignedInt
IDREFS Built-in derived IDREF
ENTITIES Built-in derived ENTITY
unsignedByte Built-in derived unsignedShort</source>

== Getting Started with XML Schemas==



<source lang="xml">
File: Data.xml
<?xml version = "1.0" ?>
<Customer>
<FirstName>First</FirstName>
<MiddleInitial>Middle</MiddleInitial>
<LastName>Last</LastName>
</Customer>
File: Schema.xsd
<?xml version = "1.0" ?>
<schema xmlns = "http://www.w3.org/2001/XMLSchema">
<element name = "Customer">
<complexType>
<sequence>
<element name = "FirstName" type = "string" />
<element name = "MiddleInitial" type = "string" />
<element name = "LastName" type = "string" />
</sequence>
</complexType>
</element>
</schema></source>

== Primitive Datatypes==



<source lang="xml">
Type Name Type Derivation
duration Built-in primitive anySimpleType
dateTime Built-in primitive anySimpleType
time Built-in primitive anySimpleType
date Built-in primitive anySimpleType
gYearMonth Built-in primitive anySimpleType
gYear Built-in primitive anySimpleType
gMonthDay Built-in primitive anySimpleType
gDay Built-in primitive anySimpleType
gMonth Built-in primitive anySimpleType
boolean Built-in primitive anySimpleType
base64Binary Built-in primitive anySimpleType
hexBinary Built-in primitive anySimpleType
float Built-in primitive anySimpleType
double Built-in primitive anySimpleType
anyURI Built-in primitive anySimpleType
QName Built-in primitive anySimpleType
NOTATION Built-in primitive anySimpleType
string Built-in primitive anySimpleType
decimal Built-in primitive anySimpleType</source>

== <schema> Declarations==



<source lang="xml">
To connect the two documents, you include a reference to the XML Schema within your instance document.
You begin XML schema with the XML declaration, <?xml version="1.0"?>.
The root element within your XML Schema is the <schema> element.
Within the <schema> element, you have the namespace declaration.
The namespace of the <schema> element is http://www.w3.org/2001/XMLSchema.
targetNamespace attribute indicates that the vocabulary is for the namespace http://www.wbex.ru/name.
You can declare a namespace that matches your targetNamespace with the prefix target to refer to any declarations within your XML Schema.
The attribute elementFormDefault controls the way namespaces are used within your corresponding XML document.
<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:target="http://www.wbex.ru/name"
targetNamespace="http://www.wbex.ru/name"
elementFormDefault="qualified">

</schema></source>

== <schema> element is the root element within an XML Schema.==



<source lang="xml">
<schema targetNamespace="URI"
attributeFormDefault="qualified or unqualified"
elementFormDefault="qualified or unqualified"
version="version number">
You could use any of the following for the XML schema namespace :
<schema xmlns="http://www.w3.org/2001/XMLSchema"> or
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> or
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

Within the <schema> element you can specify how elements should be qualified: elementFormDefault and attributeFormDefault
The elementFormDefault and attributeFormDefault attributes enable you to control the default qualification form for elements and attributes.
The default value is unqualified.</source>

== Simple and Complex Types==



<source lang="xml">
Elements that can contain only text are simple type.
Elements that contain other elements or that contain attributes are a complex type.
Attributes are simple type.
There are several built-in simple types, like date, integer, and string.
You can build custom simple types.
Elements of complex type describe the structure of a document, rather than its content.
There are four basic kinds of complex types:
elements that contain just other elements,
elements that contain both elements and text,
elements that contain only text
elements that are empty.
Each of these may contain attributes as well.
Both simple and custom types may be named, which can be reused in other places.
Both simple and custom types may be anonymous, which are used only within the element in which the definition appears.</source>

== Target Namespaces==



<source lang="xml">
The primary purpose of XML Schemas is to declare vocabularies.
These vocabularies can be identified by a namespace that is specified in the targetNamespace attribute.
Not all XML Schemas will have a targetNamespace.
Many XML Schemas define vocabularies that are reused in another XML Schema.
Possible targetNamespace declarations include the following:
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru/name"
xmlns:target="http://www.wbex.ru/name">
or
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru/name"
xmlns="http://www.wbex.ru/name">

In the first declaration, the <schema> element uses the default namespace.
Because of this the target namespace http://www.wbex.ru/name requires the use of a prefix.
In the second declaration, the <schema> element requires the use of a prefix.
Because the target namespace http://www.wbex.ru/nameis using a default namespace declaration.</source>

== Useful built-in simple types==



<source lang="xml">
Built-in type Description Example(s)
xsd:string A sequence of any of the legal XML characters This is a string.
xsd:boolean The value true or false, or 1(true) or 0(false) true,
false
1
0
xsd:decimal A number that may contain a decimal component -5.2
xsd:integer A whole number -389
xsd:positiveInteger A positive whole number (not including 0) 5
xsd:negativeInteger A negative whole number (not including 0) -389
xsd:date A calendar date, represented as CCYY-MM-DD 2008-05-21
xsd:time A time of day, represented as hh:mm:ss.ss 11:30:00.00 (11:30 A.M.)
xsd:dateTime A date and time of day, CCYY-MM-DD Thh:mm:ss.ss 2008-05-21T17:28:00.00
xsd:gMonth A Gregorian calendar month, represented as --MM-- --05-- (May)
xsd:gYear A Gregorian calendar year, represented as CCYY 2008
xsd:gDay A day of a Gregorian calendar month, represented as ---DD ---05
xsd:gYearMonth A Gregorian calendar year and month, as CCYY-MM 2008-05 (May, 2008)
xsd:anyURI A URI http://www.wbex.ru</source>

== XML Schema defines the name vocabulary.==



<source lang="xml">
It shows how to refer to the XML Schema from the instance document.
You used the XML Schema to determine whether your instance document was schema valid.
File: Schema.xsd
<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:target="http://www.wbex.ru/name"
targetNamespace="http://www.wbex.ru/name"
elementFormDefault="qualified">
<element name="name">
<complexType>
<sequence>
<element name="first" type="string" />
<element name="middle" type="string" />
<element name="last" type="string" />
</sequence>
<attribute name="title" type="string" />
</complexType>
</element>
</schema>

File: Data.xsl
<?xml version="1.0"?>
<name xmlns="http://www.wbex.ru/name"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.wbex.ru/name name5.xsd"
title="Mr.">
<first>John</first>
<middle>Joh</middle>
<last>Doe</last>
</name></source>

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