install data/docbook since docbook-catalog-install.sh is called (noted by Andrew Chace)
# install additional dependencies
ADDITIONAL_PKGS='
developer/versioning/subversion
service/postrun
data/docbook
'
pkg install $ADDITIONAL_PKGS
# set up default IPS repository
pkgrepo create /export/repos/repo_local
pkgrepo -s /export/repos/repo_local set publisher/prefix=local
svccfg -s pkg/server setprop pkg/inst_root=/export/repos/repo_local
svcadm enable pkg/server
sleep 30 # allow server to come up
pkg set-publisher -O http://localhost:80/ local
# prepare SGML catalogs for offline usage
/usr/share/sgml/docbook/docbook-catalog-install.sh