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Cloned from launchpad blueprint https://blueprints.launchpad.net/glance/+spec/iso-image-metadata. Description: ISO9960 filesystem images contain a variety of pieces of embedded metadata that can be used to identify the operating system installer associated with the image. While an application can download the ISO from glance and read the header this is unduely inefficient & can result in them being billed for bandwidth. Far nicer is for glance to automatically extract relevant ISO file metadata and use it to set some standard properties against the image, which apps can then query efficiently. Specification URL (additional information): http://wiki.openstack.org/GlanceISOHeaders