Reference

Get/set XMP metadata Functions for getting/setting XMP metadata in a variety of media formats
get_xmp() get_xmp_exiftool() set_xmp() set_xmp_exiftool()	Set/get xmp metadata
xmp()	XMP metadata object
as_xmp()	Coerce to xmp objects
as_lang_alt()	Coerce to XMP "language alternative" structure
Get/set PDF bookmarks Functions for getting/setting PDF bookmarks (aka table of contents)
get_bookmarks() get_bookmarks_pdftk() get_bookmarks_pdftools() set_bookmarks() set_bookmarks_pdftk() set_bookmarks_gs()	Set/get pdf bookmarks
cat_bookmarks()	Concatenate pdf bookmarks
Get/set PDF documentation info Functions for getting/setting PDF documentation info
get_docinfo() get_docinfo_pdftools() get_docinfo_exiftool() set_docinfo_exiftool() get_docinfo_pdftk() set_docinfo() set_docinfo_gs() set_docinfo_pdftk()	Set/get pdf document info dictionary
docinfo()	PDF documentation info dictionary object
as_docinfo()	Coerce to docinfo objects
Concatenate PDF files together Functions for concatenating PDF files together
cat_pages() cat_pages_gs() cat_pages_pdftk() cat_pages_qpdf()	Concatenate pdf documents together
Get number of pages Functions for getting number of pages in PDF documents
n_pages() n_pages_exiftool() n_pages_qpdf() n_pages_pdftk() n_pages_gs()	Get number of pages in a document
Detect feature support Functions for detecting various feature support
supports_get_bookmarks() supports_set_bookmarks() supports_get_docinfo() supports_set_docinfo() supports_get_xmp() supports_set_xmp() supports_cat_pages() supports_n_pages() supports_exiftool() supports_gs() supports_pdftk()	Detect support for features
enable_feature_message()	Messages for how to enable feature
SPDX License data SPDX license list dataset
spdx_licenses	SPDX License List data
Overall package description Overall package description including supported package options
xmpdf-package xmpdf	xmpdf: Edit 'XMP' Metadata and 'PDF' Bookmarks and Documentation Info