XML

Name: XML
Rating: 5 (1 reviews)
Author: Joshua

EXtensible
Markup
Language

With XML, your data is stored outside your HTML.

With XML, data can be exchanged between incompatible systems.

With XML, financial information can be exchanged over the Internet.

With XML, plain text files can be used to share data.

With XML, plain text files can be used to store data.

With XML, your data is available to more users.

XML is the mother of WAP and WML.

Example XML Document

Code

        <?xml version="1.0" encoding="ISO-8859-1"?>

<note>

<to>Daniel</to>

<from>Josh</from>

<heading>Whats Up?</heading>

<body>This is a GREAT website!</body>

</note>

The first line in the document - the XML declaration - defines the XML version and the character encoding used in the document. In this case the document conforms to the 1.0 specification of XML and uses the ISO-8859-1 (Latin-1/West European) character set.

The next line describes the root element of the document (like it was saying: "this document is a note"):

Code

<note>

The next 4 lines describe 4 child elements of the root (to, from, heading, and body):

Code

        <to>Daniel</to>

<from>Josh</from>

<heading>Whats Up?</heading>

<body>This is a GREAT website!</body>

And as you do for any other code, you close it,

Code

</note>

<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>

This is an HTML form of XML

Code

        <p>This is a paragraph

<p>This is another paragraph

This is a legal action of XML

Code

        <p>This is a paragraph</p>

<p>This is another paragraph</p>

XML IS case sensitive

Code

        <Message>NOT CORRECT!!</message>

<message>Correct!!</message>

You must nest properly!

Code

        <b><i>No</b></i>

<b><i>Yes</i></b>

All XML documents must contain a single tag pair to define a root element.

Code

        <root>

  <child>

    <subchild>.....</subchild>

  </child>

</root>

With XML, it is illegal to omit quotation marks around attribute values.
Incorrect

Code

        <?xml version="1.0" encoding="ISO-8859-1"?>

<note date=08/27/06>

<to>Daniel</to>

<from>Josh</from>

</note>

Correct

Code

        <?xml version="1.0" encoding="ISO-8859-1"?>

<note date="08/27/06">

<to>Daniel</to>

<from>Josh</from>

</note>

Author:

Joshua

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2,156

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