active server page

asp.net supports language independence
but asp doesn't support

In asp write the server side code along with designing code
asp.net supports designing part and server side code in 
different pages

Web.xml is a simple configuration setup file for the root of
web-app .here we can descript the class and path of the web
core...

XmlDocument and XPathDocument are based on different data 
models.
XmlDocument is based on W3C XML DOM, which is object model 
that
basically covers all XML syntax, including low level syntax 
sugar such
as entities, CDATA sections, DTD, notations etc. That's 
document-centric
model and it allows for full fidelity when loading/saving 
XML documents.

XPathDocument is based on XPath 1.0 data model which is 
read-only XML
Infoset-compatible data-centric object model that covers 
only
semantically significant parts of XML, leaving out 
insignificant syntax
details - no DTD, no entities, no CDATA, no adjacent text 
nodes, only
significant data expressed as a tree with seven types of 
nodes. Simple
and lightweight.

mainly it is a part of xsl ,it is a language that is used to
acess different parts of an xml document, such as element
and attributes.

mainly it is a part of xsl ,it is a language that is used to
acess different parts of an xml document, such as element
and attributes.

xml document usually begins with the xml declaration
statement also called PI(processing instruction).

We use XMLTextReader  to read XML streams.XMLdocument
 can be used to edit and navigate the document.

Creating Object for XML we can Access the Elements...
Microsoft Provider....

This way u can access...
XmlDocument xmldoc = new XmlDocument(); 
xmldoc.Load(Server.MapPath("Employee.xml")); 
XmlNodeList xmlnodes = xmldoc.SelectNodes
("Employee/EmpName"); 
DataGrid1.DataSource = xmlnodes; 
DataGrid1.DataBind ();

Using DTD we can load XML document.
using Parser of XMLSpy to perform validation of the document

For the use of web publishng

XML is a eXtensible markup language. It is a subset of SGML.

XML: is not a case sensitive
HTML: is a case sensitive

XML: describes data and focus on what data is.
HTML: displays data and focus on how data looks.

XML: user defined tag.
HTML: Pre-defined tag

XML is a Case Sensitive

XML is use to store data while HTML is use to display data.
XML use user defined tags while HTML use Predefined tags.

<opt>
      <username>testuser</username>
      <password>frodo</password>
    </opt>


or 


<params>
<param name="action">login</param>
<param name="login">jon@doe.com</param>
<param name="password">foobar</param>
</params>

1. Platform Independent : Uses plain-text format which is 
understandable on all platforms.

2. Extensible : Customized tags can be created as per the 
needs.

it allows data interchange  between different computers
it enable smart searches.
it provides user-selected view of data.

<?xml version='1.0'?>
<?xml version="1.0" encoding="UTF-8" standalone="no"?>

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