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The DOI technical support service provider and the DOI Foundation are committed to maintaining the DOI Proxy in perpetuity, as it is an essential component to maintaining the integrity of the millions of instances of DOI name-based web links. Maintaining the utility of those links over time will require maintaining both the core DOI System and the specific gateway service, doi.org, that those links reference and so use to gain access to the core DOI System. This, of course, is not at all unique and is just another variation on the Internet theme of layering services on top of one another. doi.org is itself dependent on the Domain Name System (DNS), which is itself dependent on IP addressing and routing, etc.