Introduction to RDF

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# Introduction to RDF

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RDF stands for Resource Description Framework.

RDF is a standard for describing Web resources.

RDF can be used to describe title, author, content, and copyright information of web pages.

## RDF Document Example

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:si="http://www.w3schools.com/rdf/">
<rdf:Description rdf:about="http://www.w3schools.com">
<si:title>W3Schools</si:title>
<si:author>Jan Egil Refsnes</si:author>
</rdf:Description>
</rdf:RDF>

## What You Should Already Know

Before you continue you should have a basic understanding of the following:

- HTML
- XML and XML Namespaces

If you want to study these subjects first, find the tutorials on our Home page.

## What is RDF?

- RDF stands for Resource Description Framework
- RDF is a framework for describing resources on the web
- RDF is designed to be read and understood by computers
- RDF is not designed for being displayed to people
- RDF is written in XML
- RDF is a part of the W3C's Semantic Web Activity
- RDF is a W3C Recommendation

## RDF - Examples of Use

- Describing properties for shopping items, such as price and availability
- Describing time schedules for web events
- Describing information about web pages (content, author, created and modified date)
- Describing content and rating for web pictures
- Describing content for search engines
- Describing electronic libraries

## RDF is Designed to be Read by Computers

RDF was designed to provide a common way to describe information so it can be read and understood by computer applications.

RDF descriptions are not designed to be displayed on the web.

## RDF is Written in XML

RDF documents are written in XML. The XML language used by RDF is called RDF/XML.

By using XML, RDF information can easily be exchanged between different types of computers using different types of operating systems and application languages.

## RDF and "The Semantic Web"

The RDF language is a part of the W3C's Semantic Web Activity. W3C's "Semantic Web Vision" is a future where:

- Web information has exact meaning
- Web information can be understood and processed by computers
- Computers can integrate information from the web

## RDF is a W3C Recommendation

RDF became a W3C Recommendation 10. February 2004.

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