In the guide to add a cross mark The following tag should be added :
<meta name="dc.identifier" content="doi:10.58803/JVPP.2023.2.1.01"/>
But it is added like this in the Dublin Core plugin
<meta name="DC.Identifier" content="15"/>
and has another tag as
<meta name="DC.Identifier.DOI" content="10.58803/JVPP.2023.2.1.01"/>
My question is that according to the manual of the Crossref site, dc.identifier should be equal to doi, But it is not like this in the output of the plugin
Is the crossref manual old and the method changed?