Search engines have begun to provide richer search results by extracting structured details from the Web pages they crawl and, in turn, Web publishers are producing more structured data within their content to improve their standing with search engines. A key enabling technology behind these developments is the ability to add structured data to HTML pages directly using RDFa (Resource Description Framework in Attributes). This Primer shows how to express data in HTML using RDFa and, in particular, how to mark up existing human-readable Web page content to express machine-readable data.
URL: https://www.w3.org/TR/xhtml-rdfa-primer/
Keywords: HTTP URIs, Hypertext Markup Language (HTML), Schema.org
Author: Birbeck, Mark
Publisher: W3C
Date created: 2015-03-17 07:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
Educational use: instruction
Educational audience: student
Interactivity type: expositive
- Expresses data in serializations such as RDF/XML, N-Triples, Turtle, N3, Trig, JSON-LD, and RDFa.
- Knows HyperText Markup Language, or HTML (1991+), as a language for "marking up" the content and multimedia components of Web pages.
- Knows that Uniform Resource Identifiers, or URIs (1994), include Uniform Resource Locators (URLs, which locate web pages) as well as location-independent identifiers for physical, conceptual, or web r