The guidance on organisation registration agencies says for XM-IATI (emphasis mine):
XI-IATI is a list of organisation identifiers that is maintained by the IATI Secretariat. Any publisher may apply to the IATI Technical Team for an identifier to be generated.
And so we see requests starting to come in: Solidaridad, NSO
The “may apply” sentence suggests that IATI will hand out organisation identifiers in the XI-IATI namespace to anyone who asks. I think that is a really bad idea. I propose to change it to “In exceptional cases, a publisher may be assigned an identifier by the IATI Technical Team.” (This is in line with Bill’s comment that XI-IATI is a last resort.)
The Secretariat should add more registration agencies, for instance with the https://identify-org.net/codelist/ project and using the Wikipedia list of company registers.
Just to add that as the Organisation Registration Agency codelist is a non-embedded codelist we can update the XI-IATI description at any time and outside of the Standard Upgrade process. Therefore I have moved this post from the Standard Management -> Modifications, Additions, Improvements Discuss category to Standard Management -> Non Embedded Codelist Amendments