NEXUS: an extensible file format for systematic information.

@article{Maddison1997NEXUSAE,
  title={NEXUS: an extensible file format for systematic information.},
  author={David R. Maddison and David L. Swofford and Wayne P. Maddison},
  journal={Systematic biology},
  year={1997},
  volume={46 4},
  pages={
          590-621
        }
}
NEXUS is a file format designed to contain systematic data for use by computer programs. The goals of the format are to allow future expansion, to include diverse kinds of information, to be independent of particular computer operating systems, and to be easily processed by a program. To this end, the format is modular, with a file consisting of separate blocks, each containing one particular kind of information, and consisting of standardized commands. Public blocks (those containing… 

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