Software Metadata Definitions

The spec will provide a base library of metadata definitions for various
common software products, components, and libraries that may exist on
particular image (or volume or instance). These metadata definitions will
make it easier for end users and admins to easily describe the software and
its properties. This information will enable an improved and faster user
experience for applying software metadata, searching based on software
metadata, and viewing the software information about an image.

Various improvements in horizon are underway to take advantage of this
metadata. For example, a user launching an instance will be able to expand
the image row to see addition information about the image. This will include
providing the metadata definition for properties on the image. This same
information will also be visible from the image and instance details page.

The following screenshot mockup provides an example from the instance details:

https://wiki.openstack.org/w/images/3/37/Instance-details-mock-january-2015.png

Full spec: https://review.openstack.org/#/c/148004/