R package containing historical plant protection product authorisation data for Switzerland read in using srppp v1.0.1 for each year from 2011 to 2024. The description given in the package DESCRIPTION file is below: "Data objects extracted from historical XML versions of the Swiss Register of Plant Protection Products 'SRPPP'. Starting from 2011, one such data object is contained for each year. Note that the information contained in this project is outdated. An online version of the current register can be accessed via https://www.psm.admin.ch/de/produkte. An XML dump of the current register can be read in using the 'srppp' package. There is no guarantee of correspondence of the data contained in or read in using this package with any online version, or with the original registration documents. Also, the Federal Food Safety and Veterinary Office, coordinating the authorisation of plant protection products in Switzerland, does not answer requests regarding this package."