2.2.3.2.4.1 DRM Version 1 License Format Within a Version 7 License Response
If the version attribute of the LICENSE element is equal to "0.1.0.0", the LICENSE element contains a base64-encoded version 1 CERTIFIED_LICENSE.
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If the version attribute of the LICENSE element is equal to "0.1.0.0", the LICENSE element contains a base64-encoded version 1 CERTIFIED_LICENSE.