Digital Object Identifiers (DOI) are nowadays the academia variant of URLs. DOIs are somewhat similar to URNs, they don't resolve directly somewhere in the web

Digital Object Identifiers (DOI) are nowadays the academia variant of URLs. DOIs are somewhat similar to URNs, they don't resolve directly somewhere in the web but are more a kind of identifier. There are various tools for resolving, see for instance https://www.doi.org/tools.html https://www.doi.org/tools.html Platforms such as https://zenodo.org/ https://zenodo.org/ allow for uploading digital artifacts such as publication attachments, supplementary codes or measurement/survey data and assigning them permanently with a DOI. Zenodo may go down, but maybe some hard disk survives and resolving that DOIs will be possible at some future web system. DOIS are built to last!