Search engines have started to provide richer search results by extracting fine-grained structured details from the Web pages they crawl. In turn, web publishers are producing increasing amounts of structured data within their Web 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. RDFa (Resource Description Framework in Attributes) is a technique that allows just that: it provides a set of markup attributes to augment the visual information on the Web with machine-readable hints. In this Primer, we show how to express data using RDFa in HTML, and in particular how to mark up existing human-readable Web page content to express machine-readable data.

URL: http://www.w3.org/TR/xhtml-rdfa-primer/#bib-rdfa-core
Keywords: Schema.org, RDFa, Hypertext Markup Language (HTML), Validation Service, Controlled Vocabulary, Ontology
Author: Adida, Ben
Publisher: W3C
Date created: 2015-03-17 07:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Educational use: instruction
Educational audience: student
Interactivity type: expositive