We started new thread for XML related tips and also issue handling so guys post some new information related to XML

__________________
V.Vadivelan

There never a wrong time to do the right thing.

What is XML?

XML stands for EXtensible Markup Language
XML is a markup language much like HTML
XML was designed to carry data, not to display data
XML tags are not predefined. You must define your own tags
XML is designed to be self-descriptive

__________________
R.Sundar Raja

What is the difference between XML and HTML?


XML is not a replacement for HTML.
XML and HTML were designed with different goals:

XML was designed to transport and store data, with focus on what data is.
HTML was designed to display data, with focus on how data looks.

HTML is about displaying information, while XML is about carrying information.

__________________
R.Sundar Raja

XML is Used to Create New Internet Languages:


Here are some examples:

1. XHTML the latest version of HTML
2. WSDL for describing available web services
3. WAP and WML as markup languages for handheld devices
4. RSS languages for news feeds
5. RDF and OWL for describing resources and ontology
6. SMIL for describing multimedia for the web

__________________
R.Sundar Raja

Hui guys can anybody let me know What is XSNL?

__________________
Vignesh
$Live It The Way You Love It$

Difference between XML and HTML :

" XML

User definable tags

Content driven

End tags required for well formed documents

Quotes required around attributes values

Slash required in empty tags



HTML

Defined set of tags designed for web display

Format driven

End tags not required

Quotes not required

Slash not required

__________________
Vignesh
$Live It The Way You Love It$

Rules for making a tag name in XML :

" Rules for making a tag name are

1.It should start with a letter or underscore(_)
2.There are no reserved words , but however xml(in any case) should not be used as a tag name
3.It can include digits, hyphen,periods, ':' can be used but best avoided because it is used for the namespace.

__________________
Vignesh
$Live It The Way You Love It$

Differences between SAX and DOM parsers :

Both SAX and DOM are used to parse the XML document. Both has advantages and disadvantages and can be used in our programming depending on the situation

SAX:

1. Parses node by node

2. Doesnt store the XML in memory

3. We cant insert or delete a node

4. Top to bottom traversing

DOM :

1. Stores the entire XML document into memory before processing

2. Occupies more memory

3. We can insert or delete nodes

4. Traverse in any direction.

If we need to find a node and doesnt need to insert or delete we can go with SAX itself otherwise DOM provided we have more memory.

__________________
Vignesh
$Live It The Way You Love It$

Schema :

"SCHEMA is nothing but METADATA. The schema holds all the information of the xml file that is to be deployed in the project. Metatdata is nothing about data about data since we know that xml is used for data representation language we will be able to understand what metadata is. Metadata includes the tags that is going to be exchanged to and fro from another xml file. "

__________________
Vignesh
$Live It The Way You Love It$

Limitations of a DTD :

" DTD (DATA TYPE DEFINITION ) which supervises two conditions namely well formedness and closeness of the xml file. So the user should be aware of what tags he was put into use of this xml file 'A' should be intimated to another application's XML file 'B', by then our xml file will interact with the another xml file, this is the major limitation and mandatory issue that the developers should follow. "

__________________
Vignesh
$Live It The Way You Love It$