XML file :

" SAX, event based XML parser is probably what is needed to search huge file. DOM store the whole content on memory which is in huge file is not good since it uses a lot of memory. SAX is event based that handle XML elements when it find it."

__________________
Vignesh
$Live It The Way You Love It$

CDATA section in XML :

"CDATA in XML is the character data is is not parsed by the XML Processor. If there is a section in the document that you do not want the XML processor to parse, then it can be enclosed in
<![CDATA[ ......................]]> "

__________________
Vignesh
$Live It The Way You Love It$

Entity Referencing :

" Referencing the entity by name causes it to be inserted into the document in place of the entity reference. To create an entity reference, the entity name is surrounded by an ampersand and a semicolon, like this:
&entityName; "

__________________
Vignesh
$Live It The Way You Love It$

The XML DOM

The XML DOM (XML Document Object Model) defines a standard way for accessing and manipulating XML documents.

The DOM views XML documents as a tree-structure. All elements can be accessed through the DOM tree. Their content (text and attributes) can be modified or deleted, and new elements can be created. The elements, their text, and their attributes are all known as nodes.

In the example below we use the following DOM reference to get the text from the <to> element:

xmlDoc.getElementsByTagName("to")[0].childNodes[0].nodeValue

* xmlDoc - the XML document created by the parser.
* getElementsByTagName("to")[0] - the first <to> element
* childNodes[0] - the first child of the <to> element (the text node)
* nodeValue - the value of the node (the text itself)

__________________
V.Vadivelan

There never a wrong time to do the right thing.

The HTML DOM

The HTML DOM (HTML Document Object Model) defines a standard way for accessing and manipulating HTML documents.

All HTML elements can be accessed through the HTML DOM.

In the example below we use the following DOM reference to change the text of the HTML element where id="to":

document.getElementById("to").innerHTML=

* document - the HTML document
* getElementById("to") - the HTML element where id="to"
* innerHTML - the inner text of the HTML element

__________________
V.Vadivelan

There never a wrong time to do the right thing.

The XMLHttpRequest object is the developers dream, because you can:

* Update a web page with new data without reloading the page
* Request data from a server after the page has loaded
* Receive data from a server after the page has loaded
* Send data to a server in the background

The XMLHttpRequest object is supported in all modern browsers.

__________________
V.Vadivelan

There never a wrong time to do the right thing.

XML Namespaces provide a method to avoid element name conflicts.

__________________
V.Vadivelan

There never a wrong time to do the right thing.

CDATA - (Unparsed) Character Data

The term CDATA is used about text data that should not be parsed by the XML parser.

Characters like "<" and "&" are illegal in XML elements.

"<" will generate an error because the parser interprets it as the start of a new element.

"&" will generate an error because the parser interprets it as the start of an character entity.

Some text, like JavaScript code, contains a lot of "<" or "&" characters. To avoid errors script code can be defined as CDATA.

Everything inside a CDATA section is ignored by the parser.

A CDATA section starts with "<![CDATA[" and ends with "]]>":

__________________
V.Vadivelan

There never a wrong time to do the right thing.

Why an XML Editor?

Today XML is an important technology, and development projects use XML-based technologies like:

* XML Schema to define XML structures and data types
* XSLT to transform XML data
* SOAP to exchange XML data between applications
* WSDL to describe web services
* RDF to describe web resources
* XPath and XQuery to access XML data
* SMIL to define graphics

To be able to write error-free XML documents, you will need an intelligent XML editor!

__________________
V.Vadivelan

There never a wrong time to do the right thing.

XML Editors

Professional XML editors will help you to write error-free XML documents, validate your XML against a DTD or a schema, and force you to stick to a valid XML structure.

An XML editor should be able to:

* Add closing tags to your opening tags automatically
* Force you to write valid XML
* Verify your XML against a DTD
* Verify your XML against a Schema
* Color code your XML syntax

__________________
V.Vadivelan

There never a wrong time to do the right thing.