Today W3C published the RDF 1.1 document suite as a Recommendation. In "What's New in RDF 1.1" [1] you can find a description of new and updated RDF features, such as:
* inclusion of multiple graphs in the RDF data model [2]
* revised Semantics document [3], co-edited by Pat Hayes and Peter F. Patel-Schneider
* JSON-LD [4], which connects the JSON and RDF worlds
* standardized syntax for Turtle [5], aligned as much as possible with SPARQL
* TriG [6]: extension of Turtle to support multiple graphs
* N-Triples [7] and N-Quads [8]: line-based exchange formats for single/multiple graphs
* new RDF Primer [9]