The W3C RDFa Working Group has added some new predefined prefixes to the RDFa Core Initial Context:
prov” is predefined prefix for “
http://www.w3.org/ns/prov#“, used by the “PROV Provenance Ontology”, currently a W3C Proposed Recommendation
rr” is a predefined prefix for “
http://www.w3.org/ns/r2rml#“, used by the “R2RML: RDB to RDF Mapping Language” W3C Recommendation
sd” is a predefined prefix for “
http://www.w3.org/ns/sparql-service-description#“, used by the “SPARQL 1.1 Service Description” W3C Recommendation
dc11” is a predefined prefix for “
http://purl.org/dc/elements/1.1/“, used by the “Dublin Core Metadata Element Set, Version 1.1”.
RDFa 1.1 predefined prefixes, part of the RDFa 1.1 Initial Contexts, is a convenience mechanism that can be used by RDFa 1.1 authors as CURIE prefixes without the necessity to define those explicitly through the @prefix attribute of RDFa 1.1; the RDFa Core Initial Context defines prefixes that are valid for all Host Languages for RDFa 1.1.. Implementations may choose to access the list of these prefixes (also available in Turtle format) dynamically, or hard code them in their distribution. Authors should check whether their particular tool has already been upgraded to include these new prefixes; implementers are encouraged to add them as soon as possible.