Licences
CRANLicence
Method, the licence Method Licence figures come from the Licences
License field of each package's DESCRIPTION file, read the way R itself reads it. No licence file is opened.tools::analyze_license() and R's own licence database, as CRAN's checks read it.| is read, so one string can offer two families.
Install tree
This package left CRAN, and install trees are kept only for current packages.
Releases
All 5 releases on record declare GPL-3 Copyleft.