RDFa - Xml format

RDFa is a xml format created in 2004.

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20Years Old

RDFa (or Resource Description Framework in Attributes) is a W3C Recommendation that adds a set of attribute-level extensions to HTML, XHTML and various XML-based document types for embedding rich metadata within Web documents. The RDF data-model mapping enables its use for embedding RDF subject-predicate-object expressions within XHTML documents. It also enables the extraction of RDF model triples by compliant user agents. Read more on Wikipedia...

RDFa website
RDFa Wikipedia page
RDFa first developed in World Wide Web Consortium
rdfa.info was registered in 2006
See also: (1 related languages)JSON-LD

Example from the web:

<div xmlns:dc="http://purl.org/dc/elements/1.1/"
  about="http://www.example.com/books/wikinomics">
  <span property="dc:title">Wikinomics</span>
  <span property="dc:creator">Don Tapscott</span>
  <span property="dc:date">2006-10-01</span>
</div>