To cite package ‘xmpdf’ in publications use:

Davis T (2026). xmpdf: Edit 'XMP' Metadata and 'PDF' Bookmarks and Documentation Info. R package version 0.2.1, https://github.com/trevorld/r-xmpdf.

Corresponding BibTeX entry:

  @Manual{,
    title = {xmpdf: Edit 'XMP' Metadata and 'PDF' Bookmarks and
      Documentation Info},
    author = {Trevor L Davis},
    year = {2026},
    note = {R package version 0.2.1},
    url = {https://github.com/trevorld/r-xmpdf},
  }