XML is used in many aspects of web development, often to simplify data storage and sharing.
If you need to display dynamic data in your HTML document, it will take a lot of work to edit the
HTML each time the data changes.
With XML, data can be stored in separate XML files. This way you can concentrate on using HTML
for layout and display, and be sure that changes in the underlying data will not require any
changes to the HTML.
content of your web page.
In the real world, computer systems and databases contain data in incompatible formats.
XML data is stored in plain text format. This provides a software- and hardware-independent way
of storing data.
This makes it much easier to create data that can be shared by different applications.
One of the most time-consuming challenges for developers is to exchange data between incompatible
systems over the Internet.
Exchanging data as XML greatly reduces this complexity, since the data can be read by different
Upgrading to new systems (hardware or software platforms), is always time consuming. Large
amounts of data must be converted and incompatible data is often lost.
XML data is stored in text format. This makes it easier to expand or upgrade to new operating
systems, new applications, or new browsers, without losing data.
Different applications can access your data, not only in HTML pages, but also from XML data
With XML, your data can be available to all kinds of "reading machines" (Handheld
computers, voice machines, news feeds, etc), and make it more available for blind people, or
people with other disabilities.
A lot of new Internet languages are created with XML.
Here are some examples:
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