A researcher here at my institution is asking about getting a doi for his publication to increase its findability and exposure. Does one have to go through the avenue of a Registration Agency? If so, what are your recommendations?
Kathleen - doi's are usually 'routinely' applied to publications via the publisher of your article. You can go through agencies i.e. Crossref (perhaps the most common) - but you could incur a cost. Best to check first that the publisher has not already assigned a doi (this usually occurs as soon as the article is 'in press') - or request if it is not part of their routine service. The link here is to the doi organisation site FAQ.
Most serious journals nowadays are registered with the DOI agencies and asign a DOI number to the articles they publish automatically. So, I think that if your article does not have a DOI, it may depend on the policy of the journal or may be the journal is still new and is not yet registered.
The "article" in question is a document found here - a research guide: https://worship.calvin.edu/resources/resource-library/the-geography-of-worship/ It was not published in a journal. It was written by two geography professors at my institution. So, no publisher, per se.
We've briefly looked at Crossref. That may be promising. It's really a bigger question about increasing the visibility and influence of works such as this one that are not published in a journal, (maybe not every likely to be), but that make an important contribution to the field.