|
|
Project 2 |
|
|
|
Extensible Markup Language (XML) is a document markup for
defining structured information. When a person is writing text in a word
processor, he is actually writing more than just the words on the screen.
He is also including information about how that text looks, even if he is
only typing. With most word processors, the information about how the
text looks is hidden. Markup languages are codes to tell the computer
hidden information about the text documents.
Extensible Markup Language compliments Hyper Text Markup
Language( HTML) and is based on it. When HTML first came out,
it was very similar to a word processor. It is the code language used
to display web pages by a web browser such as Internet Explorer or
Netscape Navigator. If a person save a web page, the file extension
will end in .htm or html. But if he changes the file name extension
to .txt, he can view the web page as it is written in code, and the
HTML markup language. He can view the coding of any web page
in Internet Explorer by going to view and then source.
It is important to understand that XML is not a replacement for HTML.
In future Web development, it is most likely that XML will be used to
describe the data, while HTML will be used to format and display the
same data. Tags in XML are not predefined.