is there any way to search the articles by the keyword in URL?
I found I can use “search?authors=…” for search by author or “search?title=…” for search by title, but i cant find any parameter for keyword.
in OJS2 it can be searched by keyword with “search?subject=…” but seems it removed in ojs3.
No, I think this is currently not possible i.e. you are right it is removed in OJS3. – For search results the DB tables submission_search_... are used and as far as I can see there are only titles, authors, abstracts indexed…
Same here. It’s sort of hard to see the point of having keywords assigned to articles if they can’t actually be used for searching. We think this would be a great feature (which was available in OJS 2.x, if I remember correctly).