I'm sorry, but this discussion has just taken a leap into the absurd.
To use his example, Andy knows how to get from 10.1364/JOCN.4.000001 to a particular journal, volume, and page number and he is almost certainly going to do that by using the algorithm in his head.
I'm not Andy, and I use DOIs somewhat differently. Keeping in mind that the D in DOI stands for Digital, and that everything with a DOI is supposed to be available online, if I want to read the article, I point my browser at https://dx.doi.org/10.1364/jocn.4.000001 which redirects me to a page that tells me that if I don't have a subscription, I have to pay $35. (A little googlage easily finds it for free, but whatever.)
If I'm writing a paper using a program that does DOI expansion (bibxml for example), I stick the DOI into a reference and it expands to this:
Chiu, A. L., Choudhury, G., Clapp, G., Doverspike, R., Feuer, M., Gannett, J. W., … Xu, D. (2011). Architectures and Protocols for Capacity Efficient, Highly Dynamic and Highly Resilient Core Networks [Invited]. Journal of Optical Communications and Networking, 4(1), 1. doi:10.1364/jocn.4.000001
I got the DOI in the first place by looking it up somewhere, such as by typing the title into IEEE Xplore or Google Scholar, or by following
a reference from this paper: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-21-1-469&id=248015#articleReferences If Andy can do all this in his head, he is a much better man than I am. Regards, John Levine, johnl@xxxxxxxxx, Taughannock Networks, Trumansburg NY Please consider the environment before reading this e-mail.