/usr/share/doc/hiera/examples/hiera.yaml is in hiera 3.2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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:backends:
- yaml
:hierarchy:
- "nodes/%{::trusted.certname}"
- common
:yaml:
# datadir is empty here, so hiera uses its defaults:
# - /etc/puppet/environments/%{::environment}/hieradata on *nix
# - %CommonAppData%\PuppetLabs\code\environments\%{environment}\hieradata on Windows
# When specifying a datadir, make sure the directory exists.
# :datadir:
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