Chapter 02 XML - Name Spaces (eXtensible Markup Language ) -Technology369kk

 NAME SPACE

XML namespaces are used for providing uniquely named elements and attributes in an XML document. They are defined in a W3C recommendation. An XML instance may contain element or attribute names from more than one XML vocabulary. A namespace name is a uniform resource identifier (URI). Typically, the URI chosen for the namespace of a given XML vocabulary describes a resource under the control of the author or organization defining the vocabulary, such as a URL for the author’s in the Web server. 

Table Of Content :

• XML NameSpace Introduction:
• XML NameSpace Advantages:
• XML NameSpace Disadvantages:
• XML NameSpace Example:

XML NameSpace Introduction:

• It is used to avoid element name conflict in XML document.
• It is a set of unquie names.
• Identified by URI (Uniform Resource Identified) 
• Attributes names must start form with "xmlns", 
• Syntax:
• 
  

• Conflict: Genrally conflict occures when we try yo mix XML documents from diffrence XML applications.
• Example of Conflict:
• XML1
• 
  
  

  <class>

    <name>..........</name>

  </class>

  
  

• XML2
• 
  

  <class>

    <name>..........</name>

  </class>
• 
  
• So, In this case same name parent and child then create a conflict occuress due to same..

 XML NameSpace Advantages: 

There  are some advantages of XML Namespaces:

• It avoids duplicate element names and attributes defined in an XML document where the XML element defined in one organization product may conflict with the other.
• With namespace elements and attributes can be reused in other documents or schema without any error.
• It enhances readability and the declaration of them is placed anywhere within an XML document.

XML NameSpace DisAdvantages: 

Here are some disadvantages of XML Namespaces:

• XML documents are less readable when compared to other text-based data transmission formats.
• XML namespaces are difficult to use and cannot be correctly implemented in an XML parser.

XML NameSpace Example:

<? xml version ="1.0" encoding="UTF-8" ?>

<c1:class xmlns:c1="#class1//url.......">

  <c1: name> Shailesh<c1: name>

</c1: class>

<c2: class xmlns:c2="#url Class....">

  <c2:name>Shailesh<c2:name>

  </c2:class>

  So : No There will be no conflict due to namespace

So. I hope this is helpful for YOu . Thanks For Comming Back.