12.1.2. Introduction to RDF

发布时间 :2025-10-25 12:23:45 UTC      

Resource description Framework (RDF) is a W3C standard for describing web resources, such as the title, author, modification date, content, and copyright information of a web page.

The basic knowledge you should have

Before continuing, you need to have a basic understanding of the following knowledge:

  • HTML

  • XHTML

  • XML

  • XML Namespace

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What is RDF?

  • RDF refers to the Resource description Framework (Resource Description Framework)

  • RDF is a framework for describing resources on Web

  • RDF provides a model and syntax for data so that independent groups can exchange and use it

  • RDF is designed to be read and understood by computers

  • RDF was not designed to show people

  • RDF is written in XML

  • RDF is an integral part of W3C semantic web activities

  • RDF is a W3C recommendation

RDF-Application exampl

  • Describe the properties of shopping items, such as price and availability

  • Describe the schedule of Web events

  • Describe information about the page, such as the content, the author, and the date it was created and modified

  • Describe the content and level of the web picture

  • Describe the content for search engines

  • Describe the electronic library

RDF is designed to be readable by computers

RDF is designed to provide a general way to describe information so that 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, you can easily exchange information between computers using different types of operating systems and application languages.

RDF and semantic Web

The RDF language is an integral part of W3C’s semantic Web activities. The goal of W3C’s semantic Web Vision (Semantic Web Vision) is:

  • Web information has an exact meaning

  • Web information can be understood and processed by computers.

  • Computers can integrate information from Web

RDF is a W3C standard

RDF became a W3C standard in February 2004.

W3C recommendation (standard) is regarded as web standard by industry and web community. The W3C recommendation is a stable specification developed by the W3C working group and reviewed by W3C members.

You can find the official W3C recommendation through this link.

http://www.w3.org/RDF/

Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.