To cite package StatDataML in publications use:

David Meyer, Torsten Hothorn, and Friedrich Leisch (2014). StatDataML. R package version 1.0-25.
David Meyer, Torsten Hothorn, Friedrich Leisch, and Kurt Hornik (2004). StatDataML: An XML format for statistical data. Journal of Computational Statistics, 19(3), 493-509.

Corresponding BibTeX entries:

  @Manual{,
    title = {StatDataML},
    author = {David Meyer and Torsten Hothorn and Friedrich Leisch},
    year = {2014},
    note = {R package version 1.0-25},
  }
  @Article{,
    title = {StatDataML: An XML format for statistical data},
    author = {David Meyer and Torsten Hothorn and Friedrich Leisch and
      Kurt Hornik},
    journal = {Journal of Computational Statistics},
    year = {2004},
    month = {August},
    volume = {19},
    number = {3},
    pages = {493--509},
  }