1. CMP 051 XML Introduction Session IV Chapter 12 – XML Namespaces
Chapter 13 – Using Namespaces

2. Outline Name Conflicts Uniform Resource Identifier (URI)
Designing a Namespace
Declaring a Default Namespace - The xmlns Attribute
Solving the Name Conflict Using a Prefix
Populating a XML Namespace
Referencing XML Schema Components
Locally Defined Elements
Multiple Files
Multiple Namespaces
Schema of Schemas
XSLT and Namespaces
8/1/2014
Copyright © Carl M. Burnett

3. Name Conflicts HTML Table XML
<table>   <tr>     <td>Apples</td>     <td>Bananas</td>   </tr> </table>
<table>   <name>African Coffee Table</name>   <width>80</width>   <length>120</length> </table>
8/1/2014
Copyright © Carl M. Burnett

4. Uniform Resource Identifier (URI)
URI - Uniform Resource Identifier
URL - Uniform Resource Locator URN - Uniform Resource Name
URL
URN
Directories
File Name
Domain Name
Protocol
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Copyright © Carl M. Burnett

5. Designing a Namespace Use your own domain name Must be Unique
Must be Persistent
Add Versioning
Use a URL
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Copyright © Carl M. Burnett

6. Declaring a Default Namespace The xmlns Attribute
syntax. xmlns:prefix="URI".
<course xmlns:”
<course>
<title>XML Intro </title>
<CRN>35108</CRN>
<dept> WDCE</dept> </course>
8/1/2014
Copyright © Carl M. Burnett

7. Solving the Name Conflict Using a Prefix
<root xmlns:h=" xmlns:f=" <h:table>   <h:tr>     <h:td>Apples</h:td>     <h:td>Bananas</h:td>   </h:tr> </h:table> <f:table>   <f:name>African Coffee Table</f:name>   <f:width>80</f:width>   <f:length>120</f:length> </f:table> </root>
<root> <h:table xmlns:h="   <h:tr>     <h:td>Apples</h:td>     <h:td>Bananas</h:td>   </h:tr> </h:table> <f:table xmlns:f="   <f:name>African Coffee Table</f:name>   <f:width>80</f:width>   <f:length>120</f:length> </f:table> </root>
8/1/2014
Copyright © Carl M. Burnett

8. Populating a XML Namespace
XSD
<?xml version="1.0"?>
<xs:schema xmlns:xs="
targetNamespace="
<xs:element name="ancient_wonders">
<xs:complexType>
<xs:sequence>
<xs:element name="wonder"
type="wonderType"
maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name="wonderType">
<xs:element name="name"
type="nameType"
<xs:element name="location"
type="xs:string"/>
<xs:element name="height"
type="heightType"/>
8/1/2014
Copyright © Carl M. Burnett

9. XML Schema and Documents
<?xml version="1.0"?>
<ancient_wonders xmlns="
xmlns:xsi="
xsi:schemaLocation=" xsd">
<wonder>
<name language="English">Colossus of Rhodes</name>
<name language="Greek">Κολοσσός της Ρόδου</name>
<location>Rhodes, Greece</location>
<height units="feet">107</height>
<history>
<year_built era="BC">282</year_built>
<year_destroyed era="BC">226</year_destroyed>
<how_destroyed>earthquake</how_destroyed>
8/1/2014
Copyright © Carl M. Burnett

10. Referencing XML Schema Components
To declare a default Namespace for XML Schema Components
xmlns=“URI”
To declare a Namespace with a prefix for XML Schema Components
xmlns:prefix=“URI”
To then reference those component in the XML Schema
Prefix:component_name
8/1/2014
Copyright © Carl M. Burnett

11. Locally Defined Elements
To add all locally defined elements to the targeted Namespace
In the xs:schema element
elementFormDefault=”qualified”
To add all locally defined attributes to the targeted Namespace
In the xs:schema element
attributeFormDefault=”qualified”
8/1/2014
Copyright © Carl M. Burnett

12. Locally Defined Elements
To add all particular locally defined element to the targeted Namespace
In the element definition
form=”qualified”
To keep a particular locally all locally defined element from being associated
with the targeted Namespace
In the element definition
form=”unqualified”
8/1/2014
Copyright © Carl M. Burnett

13. Multiple Files To include XML Schema components in multiple files
Directly after the xs:schema element add:
<xs:includeschemaLocation=”includefile.uri”/>
8/1/2014
Copyright © Carl M. Burnett

14. Multiple Namespaces
To import components from XML Schemas with different target namespaces
Directly after the xs:schema element in the imported document add:
<xs:inport namespace=“URI”
schemaLocation=”schema.uri”/>
8/1/2014
Copyright © Carl M. Burnett

15. Schema of Schemas
To declare the Schema of Schemas as the default namespace:
After the XML Declaration:
<schema xmlns=“
Continue to identify target namespaces, then end the shema declaration tag with a
>
Copyright © Carl M. Burnett
8/1/2014

16. XSLT and Namespaces To use a XML namespace in an XSLT style sheet:
Within the opening tag of the root element xsl:stylesheet type:
xmlns:prefix=“URI”
Label individual elements by typing:
<prefix:element>
8/1/2014
Copyright © Carl M. Burnett

17. Review Name Conflicts Uniform Resource Identifier (URI)
Designing a Namespace
Declaring a Default Namespace - The xmlns Attribute
Solving the Name Conflict Using a Prefix
Populating a XML Namespace
Referencing XML Schema Components
Locally Defined Elements
Multiple Files
Multiple Namespaces
Schema of Schemas
XSLT and Namespaces
Next – Chapter 16 – XQuery 1.0
8/1/2014
Copyright © Carl M. Burnett