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Learning XML (markup language)

I know a basic amount of knowledge of the XML language. This document will go over all my knowledge of the XML markup language:

Shebang in XML

This is an extremely important XML feature, especially when you aren't using the default *.xml file extension:

XML version 1 Shebang
<?xml version="1.0" encoding="UTF-8"?>
XML ISO 8859-1 Shebang
<?xml version="1.0" encoding="ISO-8859-1" ?>

Tags in XML

The tagged structure of XML works like this:

<?xml version="1.0" encoding="UTF-8"?>
<xml>
	<body>
		<filetree>
			<image1>JPEG</image1>
			<image2>PNG</image2>
			<image3>GIF</image3>
		</filetree>
	</body>
</xml>

You can make the tags anyway you want, as long as they contain the shebang, and follow the tag rules.

Comments in XML

Comments in XML are the same as the comments in other tag based languages, like HTML and SGML:

<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a single line comment !-->
<!-- This is
a multi-line
comment !-->

RDF summary in XML

A Resource Description Framework summary in XML can look like this:

<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:contact="http://www.w3.org/2000/10/swap/pim/contact#" xmlns:eric="http://www.w3.org/People/EM/contact#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <rdf:Description rdf:about="http://www.w3.org/People/EM/contact#me">
    <contact:fullName>Eric Miller</contact:fullName>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/People/EM/contact#me">
    <contact:mailbox rdf:resource="mailto:e.miller123(at)example"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/People/EM/contact#me">
    <contact:personalTitle>Dr.</contact:personalTitle>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/People/EM/contact#me">
    <rdf:type rdf:resource="http://www.w3.org/2000/10/swap/pim/contact#Person"/>
  </rdf:Description>
</rdf:RDF>

Other knowledge of XML

  1. XML stands for eXtensible Markup Language

  2. XML uses so many different file extensions that it would be impossible to list them all here

  3. XML is a markup language, not a programming language

  4. XML is a W3C certified language

  5. XML is a tag based language, with syntax similar to other tag-based languages, such as HTML, SGML, etc.

  6. No other knowledge of the XML language