An extensive and rapidly growing collection of richly annotated phylogenetics data is now available in the NeXML format. NeXML relies on state-of-the-art data exchange technology to provide a format that can be both validated and extended, providing a data quality assurance and adaptability to the future that is lacking in other formats. See Vos et al 2012 for further details on the NeXML format. Release Notes Fixes various (previously broken) aspects of handling polymorphic and uncertain states for discrete (non-molecular) and continuous characters, including obtaining a character matrix (#174), ensuring proper column types (#188), and serializing to NeXML (#192). Adds the optional ability to, in addition to the character matrix, obtain a concordantly formatted matrix of state types (standard, polymorphic, uncertain). Fixes loss of certain literal-valued metadata when serializing to NeXML. #193 Drops package phylobase as dependency. (Also removes circular dependency chain, because phylobase depends on RNeXML.)