XML Structure

Posted Date: 12 Jul 2009	Resource Type: Articles	Category: XML
Author: chirag	Member Level: Gold
Rating:	Points: 8

Types of XML structure

There are two kind of structure in XML.
• Physical structure
• Logical structure

Physical Structure - Arrangement of entities gives a physical structure.

Entity – A unit of information or a storage object. A document entity is an entity which contains all other entity.
Entities can reference other entities and can cause them to be included in the XML document. They can be internal or external.

e.g.


[home.page]
  [head]
    [title]
    [banner]
  [body]
    [main.title]
    [rule]
    [text]
	[para]
  [footer]

Logical Structure - Arrangement of the elements gives a logical structure.
Each XML doc must have only one root element and all the other elements must be perfectly nested inside that element.
This means that if an element contains other element, those elements must be completely enclosed within that element.

Hence, we can logically represent XML doc as a tree like structure with root element at the top of the tree.
• The elements that are inside an element are called its children.
• Elements that share the same parent elements are called siblings.

Sample XML doc


<home.page>
<head>
   <title> My home page </title>
   <banner> source=”topbanner.gif” </banner>
</head>
<body>
   <'main.title>Welcome to my home page </main.title>
   <rule/>
   <text>
     <para>
	Sorry, this page is still under construction.
	Please come back soon !
    </para>
   </text>
</body>
<footer  source=”foo.gif”> </footer>
</home.page>

And you can use the elements accordingly to the needs of the application.

Responses

Author: Miss Meetu Choudhary 13 Jul 2009 Member Level: Diamond Points : 1

Hi Chirag,
Your resource is good enough but you forgot to format the angular brackets which is done by me. So your 2 points are reduced. Please Take care of this in future resources.

++
Thanks and Regards.
Meetu Choudhary.
Site Coordinator.

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