•  Relevant XHTML attributes:

• –  @rel: a whitespace separated list of CURIEs, used for expressing relationships between two

  resources ('predicates’);

• –  @rev: a whitespace separated list of CURIEs, used for expressing reverse relationships between two resources (also 'predicates');

• –  @content: a string, for supplying machine-readable content for a literal (a 'plain literal object‘)

• –  @href: a URI for expressing the partner resource of a relationship (a 'resource object‘);

• –  @src: a URI for expressing the partner resource of a relationship when the resource is

  embedded (also a 'resource object').

•  New RDFa-specific attributes:

• –  @about: a URIorSafeCURIE, used for stating what the data is about (a 'subject’);

• –  @property: a whitespace separated list of CURIEs, used for expressing relationships between a subject and some literal text (also a 'predicate');

• –  @resource: a URIorSafeCURIE for expressing the partner resource of a relationship that is not intended to be 'clickable' (also an 'object');

• –  @datatype: a CURIE representing a datatype, to express the datatype of a literal;

• –  @typeof: a whitespace separated list of CURIEs that indicate the RDF type(s) to associate with a subject.