I understand the case for interoperability between different media sources, but what looks like a glaring omission is that nowhere on this page does it mention

I understand the case for interoperability between different media sources, but what looks like a glaring omission is that nowhere on this page does it mention whether it is a pro-DRM concept or not. If it does support artificial restrictions it doesn't solve the problem of "not actually owning your content" (their words), which is a problem created by DRM. Clearer wording on their site would be welcome.