About Crossmark button

I added the crossmark button-related code to articledetails.tpl. The button works, but when I add the metadata identifier code, which doi code will I add? When I write the doi of an article, crossmark only works for that article. I get an error when I write the doi of the journal. What can i do?

What application are you using?
For example, OJS 3.3

Hi @Ali_Kemal_Sonmez, welcome to our PKP community and thanks for your message.

Crossmark button will work on citable items, for example articles, conference papers or books, but it wouldn’t work in non-citable items like a journal. I guess that’s the reason because it doesn’t work with a journal DOI.

In the other hand, as stated in the Crossref site:

Crossmark provides a cross-platform way for readers to quickly discover the status of a research output along with additional metadata related to the editorial process. Crucially, the Crossmark button can also be embedded in PDFs, which means that members have a way of alerting readers to changes months or even years after it’s been downloaded

It means that Crossmark metadata is specific for each DOI. Here you can find a complete guide about using the Crossmark service: