What’s the best way to enter an article number instead of page numbers for an article, e.g. (number) “a107” instead of (page) 31-45. Use the field “pages” anyhow? However, this might lead to confusion in citation or export formats, so I would prefer a separated field for the article number, but this doesn’t seem to exist in OJS at the moment.
As a solution for OJS 2.x the “public identifier” was mentioned, but that’s not what I want, because if you enter a “Public URL identifier” in the metadata of an article in OJS 3 the URL of the article will be changed.