A maioria dos pkg info
reports vem das ações set do pacote que definem atributos de pacote e outros metadados. Para o seu exemplo de archiver / gnu-tar:
% pkg contents -t set -o name,value archiver/gnu-tar
NAME VALUE
info.classification org.opensolaris.category.2008:Development/GNU
info.source-url http://ftp.gnu.org/gnu/tar/tar-1.26.tar.bz2
info.upstream-url http://www.gnu.org/software/tar/
org.opensolaris.arc-caseid PSARC/2000/488
org.opensolaris.consolidation userland
pkg.description Tar is a program for packaging a set of files as a single archive in tar format.
pkg.fmri pkg://solaris/archiver/[email protected],5.11-0.175.1.0.0.20.0:20120709T173816Z
pkg.summary GNU version of the tar archiving utility
variant.arch ['i386', 'sparc']
% pkg contents -H -t set -o value -a name=pkg.summary archiver/gnu-tar
GNU version of the tar archiving utility