how to add a supplement of a volume of a journal to the XML file?
I know how to deposit XML of an ordinary article. Now I need to deposit XML that is virtually the same as an article, but it is called supplement, because it has its own numbering of pages since the page 1.
Author (2021). Title. Journal, volume 20(suppl. 1): pages 1-37.
This schema is a bit difficult to uderstand:
Could you provide an example, please?