1. doi/arxiv/... links could also easily be plugged in custom upstream remote ids, but that also feels a bit wrong since all other [upstream remote ids](https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Upstream_remote-id_types) are repos/source code providers. 2. Adding something specific to GLEP 68, like `<upstream><reference type="doi"> https...`. However that seems like a bit too much work for adding something that only a small subset of users (science) cares about. Also integration of parsing with existing tools is an extra overhead. 3. Put them also into `HOMEPAGE` of the ebuilds. Again bit of a wrong place, but with the (minor) advantage of having possibly different/new references per version.
Is any of these three superior/preferable?
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Description: OpenPGP public key
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Description: OpenPGP digital signature