This is an article on XML. I have rearranged the contents of this
newsletter to make it easier for those with screen readers, etc.
to get through - all article links, etc. are at the end. Enjoy!
_______________________
>
> ----------------------------------------------
> TheCounter.com Professional Edition
> Vol. 3 Number 7
> February 13, 2002
> http://www.theCounter.com/
> ----------------------------------------------
What is XML and How Can It Be Used?
> by Jan Egil Refsnes
>
> ----------------------------------------------
> What you should already know
> ----------------------------------------------
> Before you continue you should have some basic understanding of the
> following:
>
> -- WWW, HTML and the basics of building Web pages
> -- Web scripting languages like JavaScript and VBScript
>
> If you want to study these subjects, Go To W3Schools
> (http://www.w3schools.com/).
>
> ----------------------------------------------
> What is XML?
> ----------------------------------------------
> -- XML stands for EXtensible Markup Language
> -- XML is a markup language much like HTML.
> -- XML was designed to describe data.
> -- XML tags are not predefined in XML. You must define your own tags.
> -- XML is self describing.
> -- XML uses a DTD (Document Type Definition) to formally describe the
> data.
>
> ----------------------------------------------
> The main difference between XML and HTML
> ----------------------------------------------
> XML is not a replacement for HTML.
> XML and HTML were designed with different goals:
>
> XML was designed to describe data and to focus on what data is.
> HTML was designed to display data and to focus on how data looks.
>
> HTML is about displaying information, XML is about describing
> information.
>
> ----------------------------------------------
> XML is extensible
> ----------------------------------------------
> The tags used to markup HTML documents and the structure of HTML
> documents are predefined. The author of HTML documents can only use tags
> that are defined in the HTML standard.
>
> XML allows the author to define his own tags and his own document
> structure.
>
> ----------------------------------------------
> XML is a complement to HTML
> ----------------------------------------------
> It is important to understand that XML is not a replacement for HTML. In
> the future development of the Web it is most likely that XML will be
> used to structure and describe the Web data, while HTML will be used to
> format and display the same data.
>
> ----------------------------------------------
> XML in future Web development
> ----------------------------------------------
> We have been participating in XML development since its creation. It has
> been amazing to see how quickly the XML standard has been developed, and
> how quickly a large number of software vendors have adopted the
> standard.
>
> We strongly believe that XML will be as important to the future of the
> Web as HTML has been to the foundation of the Web. XML is the future for
> all data transmission and data manipulation over the Web.
>
> ----------------------------------------------
> How can XML be used?
> ----------------------------------------------
> -- XML can keep data separated from your HTML
> -- XML can be used to store data inside HTML documents
> -- XML can be used as a format to exchange information
> -- XML can be used to store data in files or in databases
>
> ----------------------------------------------
> XML can keep data separated from your HTML
> ----------------------------------------------
> HTML pages are used to display data. Data is often stored inside HTML
> pages. With XML this data can now be stored in a separate XML file. This
> way you can concentrate on using HTML for formatting and display, and be
> sure that changes in the underlying data will not force changes to any
> of your HTML code.
>
> ----------------------------------------------
> XML can also store data inside HTML documents
> ----------------------------------------------
> XML data can also be stored inside HTML pages as "Data Islands". You can
> still concentrate on using HTML for formatting and displaying the data.
>
> ----------------------------------------------
> XML can be used to exchange data
> ----------------------------------------------
> In the real world, computer systems and databases contain data in
> incompatible formats. One of the most time consuming challenges for
> developers has been to exchange data between such systems over the
> Internet. Converting the data to XML can greatly reduce this complexity
> and create data that can be read by different types of applications.
>
> ----------------------------------------------
> XML can be used to store data
> ----------------------------------------------
> XML can also be used to store data in files or in databases.
> Applications can be written to store and retrieve information from the
> store, and generic applications can be used to display the data.
>
> /-------------------------------------------------------------------\
>
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>
> \--------------------------------------------------------------adv.-/
>
> ----------------------------------------------
> About the Author:
>
> The author of the original XML 101 content is Jan Egil Refsnes. He is a
> Web developer with 30 years computing experience. His Norwegian
> company - Refsnes Data - is a software development and consulting
> company, focusing on Internet and client-server database development.
>
> "Jani" has participated in a large number of company critical
> development projects for oil companies like Amoco, ELF, Halliburton,
> Brown & Root and BP. He has also developed different database systems
> for governmental institutions like the national library, hospitals, the
> Norwegian police, and many others.
>
> Today his greatest concern is his Web site at http://www.w3schools.com.
> This Web site for Web developers is quickly becoming one of the most
> popular in the world, with ever increasing visitor traffic.
>
> ----------------------------------------------
> Reprinted from XML 101
>
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> ************************************************************************
> What is XML and How Can It Be Used?
> The things you need to know before you get started.
>
> ************************************************************************
>
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> /-------------------------------------------------------------------\
>
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>
> \--------------------------------------------------------------adv.-/
>
> ************************************************************************
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