L] is the portion of web pages containing annotations (for example, RDFa
/ microformats) about film titles and directors.
The Open Graph developers based the initial version of the protocol on RDFa
which means that additional <meta> tags need to be placed in the <head> of the web page.
Launched in 2010, Facebook'sOpen Graphprovides a protocol for third-party applications to publish information to the Facebook platform through a set of RDFa
(Resource Description Framework in attributes) tags.
A significant element of Drupal 7 is deployment of RDFa
for adoption of semantic Web concepts and emerging technologies.
The methodology applies RDF, RDFA
and OWL, allowing designers to formally align a domain ontology with the REA-EO.