This presentation discusses the Research Data Alliance (RDA). RDA has grown to over 2,700 members from 95 countries seeking to openly share data across technologies and disciplines. Its vision is for researchers to address societal challenges through open data sharing. RDA builds social and technical bridges to enable this through 38 interest groups and 16 working groups. Key themes discussed include persistent identifiers for data and entities, and certifying trust in assertions and organizations. The value of relationships and mediation is also emphasized.