XML Namespaces

1
XML Namespaces

• Each schema file associated with a URL to
  uniquely identify where elements come from
• Like packages in Java

http//www.ebay.com
http//www.amazon.com
http//www.superstore.ca
2
TargetNamesapce

• So, if Im writing a schema for my superstore
• targetNamespacehttp//www.superstore.com

3
Label prefixes

• Instead of referring to URLs, namespaces are
  given short prefix labels
• targetNamespacehttp//www.superstore.ca
• xmlnsebayhttp//www.ebay.com
• /

4
Referring to XML Schema schema

• XML Schema is an XML language itself with a
  schema.
• targetNamespacehttp//www.superstore.ca
• xmlnsebayhttp//www.ebay.com
• xmlnsxshttp//www.w3.org/2001/XMLSchema
• typeebayProduct/

5
Default Namespace

• One namespace can be given no label, for
  convenience
• targetNamespacehttp//www.superstore.ca
• xmlnsebayhttp//www.ebay.com
• xmlnshttp//www.w3.org/2001/XMLSchema
• 
  

6
Declarations

• Prefixes are not used when declaring names of
  elements or types
• Prefixes are used when referring to elements or
  types
• targetNamespacehttp//www.superstore.ca
• xmlnsebayhttp//www.ebay.com
• xmlnshttp//www.w3.org/2001/XMLSchema
•