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RDFa Structured data for the Web
ReferenceAdapted from the schema.org documentation. Build date: 2026-06-10.
Ben Adida Creative Commons
Three Points
- What is RDFa?
- RDFa 1.1 Lite - a Proposal
- RDFa is Better for the Web
An Old Slide (2008)
Basic Facts
Started 2004. Early adopters 2006.
W3C Recommendation 2008
Yahoo! SearchMonkey 2008
Google Rich Snippets 2009
Facebook Open Graph Protocol 2010
rNews, GoodRelations, ...
Flickr, Overstock, BestBuy,
Newsweek, PLoS,...
Simple: Annotate HTML
This blog is available under <a rel="license" href="http://cc.org/licenses/by/3.0/"> a CC license </a>
Please give credit to <span property="attributionName"> Manu Sporny </span>
Multiple Items on a Page
<div typeof="Person"> <span property="name"> Manu Sporny </span> ... </div>
<div typeof="Person"> <span property="name"> Ivan Herman </span> ... </div>
Vocabularies (Ready to Use)
<div vocab="http://schema.org/" typeof="Person"> <span property="name"> Manu Sporny </span> <img rel="image" src="manu.jpg" /> </div>
Vocabularies (On the Fly)
<div vocab="http://schema.org/" prefix="foaf: http://xmlns.com/foaf/0.1/" typeof="Person foaf:Person"> <span property="name foaf:name"> Manu Sporny </span> <img rel="image" src="manu.jpg" /> </div>
Connecting Items
<div vocab="http://schema.org/" typeof="Person"> <span property="name">Manu Sporny</span> <div rel="address"> <div typeof="PostalAddress"> <span property="streetAddress"> 1700 Kraft Drive, Suite 2408 </span> <span property="addressLocality"> Blacksburg </span> ... </div> </div> </div>
We Made Mistakes
xmlns
explicit vocabularies only
but, we improved
RDFa 1.1 has improved thanks to
Yahoo, Google, Facebook, ...
RDFa 1.1 Lite
<div vocab="http://schema.org/"typeof="Person"> <span property="name">Manu Sporny</span> <img rel="image" src="manu.jpg" />
<span property="jobTitle">CEO</span>
<div rel="address"> <span property="streetAddress"> 1700 Kraft Drive, Suite 2408 </span> ... </div>
<a rel="url" href="http://manu.sporny.org/"> manu.sporny.org </a> </div>
RDFa is Better for the Web
<div vocab="http://schema.org/"prefix="foaf: http://xmlns.com/foaf/0.1/" typeof="Person foaf:Person"> <span property="name foaf:name"> Manu Sporny </span> ...