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1
XML
Mrs.C.Santhiya
AP/IT
TCE,Madurai.

xsd
• Schema --- 1.Simple type(no child,attributes)
• restriction,built in data types.
• 2.Complex type(can contain)
• Simple content----no child,extension,restriction.
• Complex content------child,no limitations
2

syntax
• <?xml version="1.0"?>
<xs:schema>
...
...
</xs:schema>
3

Top Layer
• <?xml version="1.0"?>
<note xmlns="https://www.w3schools.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-
instance"
xsi:schemaLocation="https://www.w3schools.com
note.xsd">
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
4

XSD-Schema
• Syntax
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="x" type="y"/>
<xs:attribute name="x" type="y"/>
Example
Simple Type
<xs:element name="age">
<xs:simpleType>
<xs:restriction base="xs:integer">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="100"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
5

Restriction
6
<xs:element name="choice">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[xyz]"/>
</xs:restriction>
</xs:simpleType>
</xs:element>

• <xs:element name="letter">
<xs:simpleType>
<xs:pattern value="([a-z])*"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
7

Complex type
• <product pid="1345"/>
• <employee>
<firstname>John</firstname>
<lastname>Smith</lastname>
</employee>
• <food type="dessert">Ice cream</food>
• <description>
It happened
on <date lang="norwegian">03.03.99</date> ....
</description>
8

1.Variety
• <employee>
  <firstname>John</firstname>
  <lastname>Smith</lastname>
</employee>
• <xs:element name="employee">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="firstname" type="xs:string"/>
      <xs:element name="lastname" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
9

2.Variety
• <xs:element name="employee" type="personinfo"/>
<xs:element name="student" type="personinfo"/>
<xs:element name="member" type="personinfo"/>
<xs:complexType name="personinfo">
  <xs:sequence>
  </xs:sequence>
</xs:complexType>
10

3.
• <xs:element name="employee" type="fullpersoninfo"/>
  <xs:sequence>
  </xs:sequence>
</xs:complexType>
<xs:complexType name="fullpersoninfo">
  <xs:complexContent>
    <xs:extension base="personinfo">
      <xs:sequence>
        <xs:element name="address" type="xs:string"/>
        <xs:element name="city" type="xs:string"/>
        <xs:element name="country" type="xs:string"/>
      </xs:sequence>
    </xs:extension>
  </xs:complexContent>
</xs:complexType>
11

• <letter>
  Dear Mr.<name>John Smith</name>.
  Your order <orderid>1032</orderid>
  will be shipped on <shipdate>2001-07-13</shipdate>.
</letter>
• <xs:element name="letter">
  <xs:complexType mixed="true">
    <xs:sequence>
      <xs:element name="name" type="xs:string"/>
      <xs:element name="orderid" type="xs:positiveInteger"/>
      <xs:element name="shipdate" type="xs:date"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
12

• <xs:element name="letter" type="lettertype"/>
<xs:complexType name="lettertype" mixed="true">
  <xs:sequence>
    <xs:element name="name" type="xs:string"/>
<xs:element name="orderid" type="xs:positiveInteger"/>
    <xs:element name="shipdate" type="xs:date"/>
  </xs:sequence>
</xs:complexType>
13

Indicators
Order indicators:
•All
•Choice
•Sequence
Occurrence indicators:
•maxOccurs
•minOccurs
Group indicators:
•Group name
•attributeGroup name
14

All
• <xs:element name="person">
  <xs:complexType>
    <xs:all>
    </xs:all>
  </xs:complexType>
</xs:element>
15

choice
  <xs:complexType>
    <xs:choice>
      <xs:element name="employee" type="employee"/>
      <xs:element name="member" type="member"/>
    </xs:choice>
  </xs:complexType>
</xs:element>
16

Sequence
   <xs:complexType>
    <xs:sequence>
    </xs:sequence>
  </xs:complexType>
</xs:element>
17

maxoccur
  <xs:complexType>
    <xs:sequence>
      <xs:element name="full_name" type="xs:string"/>
      <xs:element name="child_name" type="xs:string" m
axOccurs="10"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
18

minoccurs
  <xs:complexType>
    <xs:sequence>
      <xs:element name="child_name" type="xs:string"
      maxOccurs="10" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
19

Ex-xml file
• <?xml version="1.0" encoding="UTF-8"?>
<persons xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="family.xsd">
<person>
  <full_name>Hege Refsnes</full_name>
  <child_name>Cecilie</child_name>
</person>
<person>
  <full_name>Tove Refsnes</full_name>
  <child_name>Hege</child_name>
  <child_name>Stale</child_name>
  <child_name>Jim</child_name>
  <child_name>Borge</child_name>
</person>
<person>
  <full_name>Stale Refsnes</full_name>
</person>
</persons>
20

.xsd file
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<xs:element name="person">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="person" maxOccurs="unbounded">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="child_name" type="xs:string"
            minOccurs="0" maxOccurs="5"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
</xs:element>
</xs:schema>
21

Group Indicators
• <xs:group name="groupname">
...
</xs:group>
• <xs:group name="persongroup">
  <xs:sequence>
    <xs:element name="birthday" type="xs:date"/>
  </xs:sequence>
</xs:group>
22

Group reference
• <xs:group name="persongroup">
  <xs:sequence>
    <xs:element name="birthday" type="xs:date"/>
  </xs:sequence>
</xs:group>
<xs:element name="person" type="personinfo"/>
  <xs:sequence>
    <xs:group ref="persongroup"/>
    <xs:element name="country" type="xs:string"/>
  </xs:sequence>
</xs:complexType>
23

• <xs:attributeGroup name="groupname">
...
</xs:attributeGroup>
• <xs:attributeGroup name="personattrgroup">
  <xs:attribute name="firstname" type="xs:string"/>
  <xs:attribute name="lastname" type="xs:string"/>
  <xs:attribute name="birthday" type="xs:date"/>
24

Attr Reference
• <xs:attributeGroup name="personattrgroup">
  <xs:attribute name="firstname" type="xs:string"/>
  <xs:attribute name="lastname" type="xs:string"/>
  <xs:attribute name="birthday" type="xs:date"/>
<xs:element name="person">
  <xs:complexType>
    <xs:attributeGroup ref="personattrgroup"/>
  </xs:complexType>
</xs:element>
25

<any> Element
  <xs:complexType>
    <xs:sequence>
      <xs:any minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
26

Any attribute
  <xs:complexType>
    <xs:sequence>
    </xs:sequence>
    <xs:anyAttribute/>
  </xs:complexType>
</xs:element>
27

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="https://www.w3schools.com"
xmlns="https://www.w3schools.com"
elementFormDefault="qualified">
<xs:attribute name="eyecolor">
  <xs:simpleType>
      <xs:pattern value="blue|brown|green|grey"/>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>
</xs:schema>
28

substitutionGroup
• <xs:element name="name" type="xs:string"/>
<xs:element name="navn" substitutionGroup="name"/>
29

xml
• <?xml version=“1.0”>
<computer:laptop xmlns:computer =“’ manufacturer=“IBM”>
<processor model =“centrino”>Intel</processor>
<monitor>17</monitor>
<cpuspeed>2.4</cpuspeed>
<RAM>256</RAM>
</computer:laptop>
30

Complex type
• <xml version=“1.0”>
• <schema xmlns=http://www.w3.org/2001/XMLSchema
•                 xmlns:computer= “”
•                 targetnamespace=“ “>
• <simpleType name=“gigahertz”>
• <restriction  base=“decimal”>
• <mininclusive value=“2.1”/>
• </restriction>
• </simpleType>
• <complexType name=“CPU”>
• <simpleContent>
• <extension base=“string”>
• <attribute name=“model”   type=“string”/>
• </extension>
• </simpleContent>
• </complexType>
31

Complex type
• <complexType name=“portable’>
• <all>
•         <element name=“processor”  type=“computer:cpu” />
•          <element name=“monitor”  type=“int” />
• <element name=“CPUSpeed”  type=“computer:gigahertz” />
• <element name=“RAM”  type=“int” />
• </all>
• <attribute name=“manufacturer” type=“string” />
• </complexType>
• <element  name=“laptop” type=“computer:portable” />
• </schema>
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